Palestinian police officers react during an exchange of fire with Al Aqsa Martyrs' Brigades gunmen

Dozens of armed militants briefly took control of Palestinian government buildings in the Gaza Strip Saturday to demand jobs.

Witnesses and security sources say members of the Al-Aqsa Martyrs Brigade, an armed wing of the Fatah movement, occupied several offices in central Gaza.

Separately, gunmen protesting the death of a police officer set up a roadblock at Gaza's border crossing with Egypt, threatening to prevent officials from passing. The police officer had been recently killed in a family feud.

Late Friday, gunmen in Gaza released three British hostages who had been seized earlier in the week in Rafah. A previously unknown group, Mujahadeen Brigades Jerusalem Branch, claimed responsibility for the kidnapping.

Also Friday, Palestinian police briefly occupied the Gaza-Egypt border crossing at Rafah to protest the killing of the officer, forcing the crossing to temporarily close.