Britain A massive hunt was underway for the bombers who blew up a double-decker bus and wrought carnage in underground trains in London, slaughtering at least 37 people and injuring more than 700. Britain Several London Underground lines were back in action a day after blasts ripped through three stations as well as a bus, killing at least 37 people, an AFP correspondent reported. Britain A group calling itself the Organisation of Al-Qaeda Jihad in Europe claimed the deadly attacks in London and threatened similar strikes on Italy and other US allies with troops in Iraq and Afghanistan. Britain British Prime Minister Tony Blair took back the reins of a G8 summit on African poverty and global warming after bomb blasts in London thrust him and fellow leaders into coping with a terrorist emergency. Britain Leaders from around the world voiced shock and anger over deadly blasts in the heart of London that killed at least 37 people, as European markets reeled. US Governments across Europe and the Americas tightened security following a series of deadly rush-hour bombings in London, with police stepping up patrols in airports, rail stations and public transport systems. Iraq The killing of Egypt's top envoy to Iraq was condemned around the world as Iraqi President Jalal Talabani described foreign militants linked to the insurgency as "a plague" on his country. Philippines Six members of the Philippine cabinet, including the key economic team, resigned and urged President Gloria Arroyo to step down to defuse a political crisis caused by vote-rigging allegations. Philippines Philippine military chief of staff General Efren Abu warned soldiers to stay neutral as a political crisis over vote-rigging allegations deepened. Afghanistan Numerous officials in Afghan President Hamid Karzai's government are implicated in war crimes that took place at the start of the country's bloody civil war in the early 1990s, Human Rights Watch said in a report. Mideast Palestinian prime minister Ahmed Qorei incited mounting anger from MPs for failing to address continuing security chaos during a defence of his government's record in parliament. Philippines The Philippines confirmed the country's first case of bird flu in an isolated farm just outside of Manila, but said the risk to human health was next to zero.