The federal government has moved to block the release of a refugee claimant who admitted to border officers he killed four people while he was a gang member in El Salvador.

Citizenship and Immigration Canada has applied to stay the Immigration and Refugee Board's decision, issued Tuesday, to release Jose Francisco Cardoza Quinteros.

An interim stay was granted Tuesday night, and the case will be heard in Federal Court in Vancouver on Friday morning.

According to the refugee board's decision, Cardoza Quinteros entered Canada in September 2007, at which time he told border officers he was a member of the gang Mara Salvatrucha and had killed four people.

However, refugee board member Daphne Shaw Dyck writes in the ruling that it appears Cardoza Quinteros embellished his gang history to impress the officers, and she expressed doubts that he ever killed anyone.

In its application to stay the release, the federal government repeats its assertion that Cardoza Quinteros poses a danger to the public and should remain in custody.