Merseyside Police has taken some of its motorcycles off the road after one of its officers was killed in a crash.
Pc David Shreeve, 38, was on a motorcycle training course when his bike collided with a lorry on the M58 in Skelmersdale, Lancashire.
The Honda ST1300 motorcycle has been temporarily withdrawn while the crash investigation is carried out.
Acting Assistant Chief Constable Simon Byrne said the withdrawal was a "precaution".
He added: "The safety of our officers is paramount and this decision has been made while a full investigation is carried out by Lancashire Police into the events leading up to the tragic death of Constable Shreeve.
"The position will be reviewed once we have further information from the investigation.
"In the meantime, members of the public should be reassured that we have sufficient vehicles to provide a full operational service."
Pc Shreeve, who joined Merseyside Police in 1987, leaves a wife, a two-year-old son and a daughter, five.
He lived in Wirral and was posted to the traffic division in March 1994 where he trained as a family liaison officer three years ago.
He regularly supported victims of serious and fatal road traffic collisions.