Libya

President Barack Obama warned Libyan leader Muammar Gaddafi on Wednesday there would be 'no let up' in pressure on him to go, following a second successive night of heavy NATO bombing in Tripoli.

Six loud explosions rocked Tripoli late on Tuesday within 10 minutes, following powerful strikes 24 hours earlier, including one on Gaddafi's compound that Libyan officials said killed 19 people.

Obama told a London news conference with British Prime Minister David Cameron he could not predict when Gaddafi, who is fighting a three-month-old insurgency, might be forced to go. -Reuters