Two bombs, described as “crude but viable”, have been thrown at police in Londonderry in what the PSNI says was an attempt to murder officers.
The pipe bomb-type devices were found in the area of the city’s walls at about 3.40am on Thursday.
They have since been made safe by Army experts and taken away for further examination.
Superintendent Gordon McCalmont said: “This was a reckless act and those responsible have shown a blatant disregard for life.
“Our officers are working hard to keep people safe and there can be no justification whatsoever for this. Thankfully, no one was injured.
“However, had these devices exploded we could have been looking at something very different today. This is the second bid this week to murder police officers in the city.”
It comes after shots were fire at police on Tuesday night.
Officers have been dealing with trouble in Derry over the last five days, with dozens of petrol bombs and other missiles thrown.
Superintendent McCalmont added: “I am appealing to those with influence in the area to continue to assist us in trying to bring this unnecessary and unwanted violence to an end.
“This isn’t wanted by the community and those involved are urged to cease this activity immediately.”