Police in Northern Ireland have arrested a second man over the bombing of a police station in Co Derry.
The man (53) is being questioned by detectives investigating a car bomb which exploded outside the Strand Road police station last week.
The PSNI were also granted a four-day extension to question another man in custody. The man (42) was arrested in Derry on Saturday.
No-one was hurt in the explosion, which was blamed on dissident republicans.