Watch Live: Haiti earthquake - latest updates

1230 GMT: Gordon Brown pledges assistance to Haiti, as he takes part in Prime Minister's questions in the Commons. "Haiti has moved to the centre of the world’s thoughts and the world’s compassion," he tells MPs. “The Government will respond with emergency aid in firefighters, emergency equipment and finance."

1210 GMT: Adriano Campolina, ActionAid’s Americas international director, says the charity has been able to reestablish contact with its 20 staff in Haiti. “We are expecting a massive death-toll as the main slum areas of downtown Port-au-Prince and neighbouring areas were badly affected," she warns. "There is also lots of concern about the damage in Carrefour, the epicentre of the earthquake. In the capital Port-au-Prince 80 per cent of people live in absolute poverty in shanty towns spread out over the city’s hills. We will be doing an initial assessment and are trying to get extra staff flown as soon as possible."

1205 GMT: France's foreign minister confirms that Hedi Annabi, the head of the UN Mission, and “all those around him” are now believed dead

1200 GMT: The European Commission says it has released three million euros in emergency aid, and will give more once its disaster experts have assessed Haiti's needs
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1132 GMT: The Brazilian Army says that four of its peacekeeping troops are dead, five wounded and a large number of others are missing. The statement brings the number of foreign peacekeepers confirmed to have died in the quake to 15

1130 GMT: A Philippines diplomat says that a number people - some of them members of the 157-strong Filipino peacekeeping contingent - are trapped still alive in the wreckage of the UN mission, and that other of the Filipino troops are assisting efforts to rescue them

11.20 GMT: The UN reveals that 200-250 of its staff were inside the UN peacekeeping headquarters in the Christopher Hotel in Port au Prince when the building collapsed. Several bodies have already been retrieved from the rubble. The nearby World Food Programme building is however still standing and most staff are accounted for, but the Unicef headquarters in the Haitian capital is damaged

11.16 GMT: Douglas Alexander, the International Development Secretary, is to give a statement to the Commons on the quake at around 12.30pm

1115 GMT: Save the Children says that half of its 60 strong staff in Haiti remain unaccounted for. None is British. The UK charity has released £50,000 of its funds for relief work in Haiti

1106 GMT: The International Federation of the Red Cross estimates that 3 million people have been affected by the earthquake

1101 GMT: Hsu Mien-sheng, Taiwan’s ambassador to Haiti, has been injured. His country's foreign ministry say that he was treated in hospital for a fracture. Taiwan is sending a search team with sniffer dogs to help the rescue effort

1100 GMT Jean-Bertrand Aristide, the exiled former president who has lived in South Africa since he was deposed in the 2004 coup, has released a statement grieving for his country.