Explosions and gunfire have been heard in Mogadishu as the Somali parliament came under attack as MPs were meeting. The cause of the explosions was not immediately clear.The parliament in Mogadishu - which operated as a transitional assembly from 2004 to 2012 - has been attacked several times, including in 2009 and 2010. Last month, a Somali parliamentarian was blown up and another gunned down in separate attacks.