Hundreds of supporters of Islamist groups have staged a protest in a northern Lebanese port city to demand the release of scores of prisoners suspected of plotting or carrying out militant attacks in Lebanon. About 2,000 people marched through the streets of Tripoli during Friday's protest. Police officials say some protesters attacked lawmaker Mustafa Alloush from the US-backed parliament majority. The lawmaker was taken to hospital with light injuries. There are about 300 suspects held in Roumieh prison east of Beirut on terrorism-related charges, including members of al-Qaida-inspired Fatah Islam group which fought the Lebanese army for three months last year.