Extra police are out on the streets and at railway stations across the Border region after yesterday's terror attack on a Tube train in West London.
Civil Nuclear Police at Sellafield are also on extra alert after the threat level across the UK was raised to 'critical'.
Armed officers will be on patrol at one of today's biggest events, the Cumbria Pride Festival in Carlisle.
Police Scotland's Assistant Chief Constable Bernard Higgins says his force will also be deploying armed police at key locations and in crowded areas north of the border.
"With the threat level now at Critical, Police Scotland will be increasing our operations to protect the people of Scotland, our businesses and public places.
This will include increasing the number of armed police on patrol across the country. The public should expect to see armed officers on foot patrol at key locations and crowded places across the country.
Please do not be alarmed by the presence of these armed officers. These measures are being taken to increase security at these sites, and to reassure residents, businesses, workers and visitors so they can go about their daily lives as normally as possible.
Along with event organisers, we will also be reviewing all significant events taking place over the next few days and will increase the security footprint around those events where it is deemed appropriate.
We have well-rehearsed plans to respond to major incidents and we will be continuing to work with our partners to address the current heightened threat.
However, there is no intelligence to suggest there is any specific threat to Scotland but I would ask the public to remain alert and report anything suspicious.
Terrorists want to create discord, distrust and fear. The police stand together with all communities in the UK and we will take action against any criminal behaviour, which seeks to undermine society, especially where crimes are motivated by hate. Communities defeat terrorism, which is why we must maintain the strong relationship we have between the public and the police."
A man has been arrested on suspicion of inciting racial hatred in a message posted on Twitter.
Police say the 36-year-old from Maryport is currently in custody.
The arrest followed a report from a member of the public about a tweet posted yesterday evening.
Police are searching for a missing woman from Carlisle who was last seen on Thursday.
Eileen Moorhead, 50, is described as white and around 5ft 5ins tall.
She may be driving a black Mini Cooper, registration LY51 PFA.
Officers are concerned for Eileen's welfare and are urging anyone who sees her or who has information on where she could be to call Cumbria Constabulary on 101.
Police in Cumbria say they are improving the way they track down missing adults with dementia.
The force has introduced a new form called the 'Herbert Protocol' designed to quickly gather information from family or carers on the missing person.
Cumbria Police are investigating the attempted exchange of counterfeit currency that happened on Wednesday, 10th May in Windermere.
Police say they received several calls from shop owners on the morning of the 10th May, reporting a young man around 13-years-old entering their stores and attempting to pay with a counterfeit £20 Scottish banknote.
Police are appealing for anyone who may be able to identify the suspect or provide further information.
He is described as white, aged around 13-years-old, 5ft tall and slim build.
He had brown hair which was swept to one side, the male spoke with an Irish accent.
At the time he was wearing a grey tracksuit with black patches on the knees and elbows, and was carrying a small black bag.
Anyone with information is asked to contact PC Josh Jones on 101 or Crimestoppers anonymously on 0800 555 111.
A 25 year-old man has been arrested and charged following an incident in Melrose onSaturday afternoon.
Police arrived on the scene in the town's High Street after receiving a call at about 3:05 pm.
A spokesman said: "Police attended at a business premises in Melrose High Street following reports of a male causing a disturbance.
As a result a 25 year-old man was arrested and charged and held in custody."
He is expected to appear from custody at Selkirk Sheriff Court on Monday.
Cumbria Police are appealing for witnesses after the potential attempted abduction of a child in Penrith.
Officers say a slim man, about 25 years old with stubble tried to entice a 10-year-old boy into a small, white hatchback car in Brunswick Square on Wednesday 29 March.
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A motorcyclist was clocked doing 112mph during the first weekend of action in the Borders as part of Police Scotland's Motorcycle Safety Campaign.
Officers were on patrol on Saturday and Sunday across key routes where collisions have previously taken place, to encourage safe riding and deal with any riders who put themselves in danger through irresponsible and illegal driving behaviour.
One motorcyclist was detected riding at 112mph on the A7 north of Hawick they will now be reported to the Procurator Fiscal where the penalties could include disqualification from driving and a fine.
Further weekends of action are planned by police in the region.
Knife brandished at police during two hour stand offRead the full story ›