Security forces in the Libyan Capital, Tripoli have fired tear gas on hundreds of protestors who took to the streets after Friday prayers. The demonstrations come despite heavy military presence in the suburb of Tajura, scene of previous challenges to the authority of Col. Gaddafi. An eye witness said demonstrators had burnt the official Libyan flag associated with Col. Gaddafi. A report from Tripoli says the situation has been tense with plain clothed agents every where. They are trying to stop people getting to the mosques and trying to prevent international journalists from witnessing any subsequent protests. Reports from elsewhere in Libya say there has been further fighting both in the east and west of the country. One report speaks of battles between rebel fighters and forces loyal to Col. Gaddafi in Zawiyah, 50 kilometres west of Tripoli. Other reports speak of continued fighting around the oil port of Rus Naluf which is nearly 700 kilometres east of the capital. Government planes have also been bombing a military base of occupied by anti government forces near the eastern town of Adjabiya.Washington has authorised the use of US military aircraft to help repatriate migrant workers stranded in neighbouring countries after fleeing Libya. The planes will join aircraft from other countries. Meanwhile, the British Government Minister Mr. Andrew Mitchel on a visit to Libya's border with Tunisia says satellite pictures suggest that thousands of people trying to leave Libya may have been held up some distance from the frontier. Mr. Mitchel was speaking as he toured a transit camp in Tunisia where some 18,000 people who fled Libya. A report from the border area says in the first three days of the week, more than ten thousand people arrived each day that dropped under two thousand yesterday. The UNHCR which looks after refugees said it was very concerned that the security situation might be preventing people from crossing the border after heavily armed Gaddafi loyalists moved into the border area. The international agencies are still struggling to repatriate a big backlog of stranded travelers from Libya including ten thousand Bangladeshis.Britain has confirmed reports that it has impounded more than a hundred and fifty million dollars worth of Libyan currency from a ship that had been bound for Tripoli. The Home Office says, the money was removed from the vessel after it had been escorted into a port on the East Coast of England. Britain has frozen the assets of Col. Gadaffi and his family in accordance with the UN sanctions. The ship had returned to Britain after reportedly turning back Tripoli because of concern of safety there.