**At least four people have been killed and dozens injured in a fierce gun battle in Gaza, emergency services say.**Eyewitnesses say hundreds of Hamas fighters and policemen have surrounded a mosque where followers of a radical Islamist cleric have been hiding.
They have been firing rocket-propelled grenades at the mosque in Rafah, near the Egyptian border, witnesses say.
It is thought that about two dozen supporters of the al-Qaeda group Warriors of God are inside.