Hopes & dreams shattered: Teachers walk amongst rubble inside the American School after it was attacked by protesters in Tunis, Saturday. The death toll from Friday's attack on the US embassy in Tunis, provoked by a film, rose to four, with 46 people injured, a hospital official said. – Reuters SANA'A – The Yemeni parliament Saturday said it rejected the presence of US Marines in Sana'a to boost security at the American embassy against any further protests against a US-made film mocking Islam. In a statement, parliament affirmed its “rejection of any form of foreign presence” in Yemen, saying it was up to the government to provide security for foreign embassies. Sudan too rejected a US request to send special forces to protect its embassy in Khartoum, the official SUNA news agency said. “The US government has expressed its wish to send special forces to protect its embassy in Khartoum after protests,” but the Sudanese authorities “refused to welcome these forces,” SUNA quoted a foreign ministry spokesman as saying. Pentagon spokesman George Little told reporters Friday the United States has deployed a Marine anti-terrorism unit to Sana'a to help protect the American embassy in the face of angry demonstrations. “This is partly as a response to events over the past two days at our embassy in Yemen but it's also in part a precautionary measure,” he said. “A FAST (Fleet Antiterrorism Security Team) platoon is now on the ground in Sana'a,” with a contingent of about 50 US Marines, Little said. Four people were killed Thursday when police and protesters clashed near the embassy in a protest against the film produced privately in the United States and deemed insulting to Islam. The Yemeni parliament's move came as the US scrambled to send more spies, Marines and drones to Libya, trying to speed the search for those who killed the US ambassador and three other Americans, but the investigation is complicated by a chaotic security picture in the post-revolutionary country and limited American and Libyan intelligence resources. The CIA has fewer people available to send, stretched thin from tracking conflicts across the Middle East, Africa and Asia. Much of the team dispatched to Libya during the revolution had been sent onward to the Syrian border, US officials say. And the Libyans have barely re-established full control of their country, much less rebuilt their intelligence service, less than a year after the overthrow of dictator Muammar Gaddafi. In Tripoli, authorities have identified 50 people who were involved in the attack on the US Consulate in Benghazi, a security official said Saturday. So far four people have been arrested and are being questioned, Libyan officials have said. “We know of 50 people who were involved in the attack, we have names and we know who they are, but there could be more,” Abdel-Monem Al-Hurr, spokesman for Libya's Supreme Security Committee, said. “Four have been arrested. Some of the others may have escaped via Benghazi airport, maybe to Egypt, but this is not confirmed. We have given their names to all of the Libyan border entry points.” Meanwhile, Al-Qaeda said the deadly attack on the US consulate in Benghazi, Libya was in revenge for the killing of the network's number two Abu Yahya Al-Libi, SITE Intelligence Group reported Saturday. “The killing of Abu Yahya only increased the enthusiasm and determination of the sons of (Libyan independence hero) Omar Al-Mokhtar to take revenge upon those who attack our Prophet,” Al-Qaeda in the Arabian Peninsula said in a statement. The statement comes four days after Al-Qaeda chief Ayman Al-Zawahiri issued a video eulogizing Libi, his late deputy and propaganda chief who was killed in a drone strike in June.