An explosion ripped through the office of Al Arabiya television in Gaza City on Monday, causing no injuries, police said. The newsroom was empty when an explosive device placed outside detonated, police said, destroying the outside door of the office of the Dubai-based Arabic satellite television station and damaging some walls inside.Militant groups Hamas and the Fatah-linked al-Aqsa Martyrs Brigades condemned the attack. Palestinian journalists in Gaza said they would hold a strike on Tuesday to protest the bombing. Arabiya executive editor Nabil al-Khatib said in Dubai the station had received threats against its office but it was not clear if the blast was linked to them. Palestinian police said they were investigating the attack. The explosion smashed the door of the office of Reuters across the hallway.