LONDON (AFP) - A senior Taliban leader has been killed in Afghanistan and another has given himself up to the authorities in Pakistan, Britain's Defence Ministry said Tuesday. Abdul Rasaq, also known as Mullah Sheikh, an insurgent leader in southern Helmand province, was killed along with three others in a missile strike just north of Musa Qala on Sunday, the Ministry said. Hours earlier, Mullah Rahim - said to be a senior Taliban leader in Helmand - gave himself up to authorities in Pakistan, a statement from the Ministry said. A spokeswoman from the Ministry said the British had been notified about Rahim's surrender by the Pakistani authorities. British forces spokesman Lt-Col Robin Matthews said: "The Taliban's senior leadership structure has suffered a shattering blow. "They remain a dangerous enemy but they increasingly lack strategic direction and their proposition to the Afghan people is proving ultimately negative and self-defeating."