A memorial fund set up in memory of Pc David Phillips - who was killed by a driver in a stolen car - has so far raised more than £45,000.
Merseyside Police Federation Charitable Trust set up a Just Giving page to honour an officer "tragically and unlawfully killed whilst on duty".
More than 2,000 people have donated to the memorial.
Police are continuing to question two men, aged 18 and 30, on suspicion of murder.
A candlelit vigil will be held in Merseyside in memory of murdered police officer David Phillips.
Detectives are still hunting for the driver of a stolen pick up truck who hit and killed him on Monday.
The gathering will take place at 7pm Fort perch Rock in New Brighton.
Colleagues of Pc David Phillips laid flowers at the site where he fell.
A fundraising page set up for Pc Phillips has raised thousands of pounds.
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Detectives investigating the murder of Pc David Phillips have arrested two people on suspicion of murder.Read the full story ›
Detectives investigating the murder of on duty police officer Constable Dave Phillips have arrested two people on suspicion of murder.
The two men, aged 18 and 30 from the Oxton and Wallasey areas of Wirral have been taken to police stations on Merseyside where they will be interviewed by detectives.
Merseyside Police officers have signed the book of condolence opened for Pc David Phillips, who was killed in the line of duty.
David Beckham has returned to Old Trafford ahead of a charity match in which he'll play under his old boss Sir Alex Ferguson.
Becks is back at Old Trafford! Former United midfielder looking forward to playing under Sir Alex in charity game http://t.co/P6Or0nIc6t