WASHINGTON - US PRESIDENT Barack Obama thanked British Prime Minister David Cameron and Saudi King Abdullah on Saturday for helping to disrupt a terror plot, but reiterated a call to Yemen for closer cooperation.

Mr Obama phoned Mr Cameron 'to discuss the terrorist plot that was disrupted yesterday at East Midlands Airport and in Dubai as a result of the close cooperation between the United States and the United Kingdom, as well as other international partners,' the White House said in a statement.

He also placed a call to King Abdullah of Saudi Arabia, which has been praised by US officials including Homeland Security Secretary Janet Napolitano for its tip-offs that helped thwart the plan.

Mr Obama told Mr Cameron that his top counter-terrorism advisor John Brennan was regularly speaking with his British counterpart 'as we work together to prevent and disrupt future efforts to attack our citizens,' the White House added.

The attempt to send explosive-laden parcels from Yemen to the United States has been linked by US officials to the Yemen-based Al-Qaeda in the Arab Peninsula. Mr Brennan appeared to lean heavily on Yemen on Saturday, calling the country's president and reiterating a US call for 'close' counterterrorism cooperation in the wake of the disrupted bomb plot.

'John Brennan spoke to President Ali Abdullah Saleh of Yemen this morning and emphasised that the United States stands ready to assist the Yemeni government and the Yemeni people in their fight against Al-Qaeda in the Arabian Peninsula,' the White House said in a statement.

Obama thanks UK, Saudi