Ugandan rebels have murdered a second Briton in less than a week as they step up a new offensive against tourists and aid workers. Gunmen from the Lord’s Resistance Army shot dead a British tourist in an ambush in the north of the country. According to the UK Foreign Office, the man had gone to help a group of tourists whose boat capsized in the Murchison Falls national park in north-east Uganda.�

The tourists had been rafting from Egypt to the source of the Nile, a Foreign Office spokes-woman said. After the rescue, the Briton and the rescued tourists – including Britons and New Zealanders – were travelling by car when they were ambushed and the man was shot. Another killing followed, when a British aid worker was shot dead in an ambush in neighbouring southern Sudan.�

The Foreign Office had already warned on Monday that the LRA may now be targeting “white people”, referring to a hand-written letter apparently written by the LRA and passed to locals last month