LIMA, June 16 (Xinhuanet) -- A Peruvian military helicopter crashed in a jungle area of the country's border with Colombia on Thursday, killing at least four people and seriously injuring four others, while seven more are still missing.

    The helicopter fell down during a routine check of borders along Peru's northern frontier, according to the local media.

    The Peruvian forces have dispatched other helicopters to launch rescue operations. The cause of the second military plane crash inless than two months was unknown yet.

    On April 28, a twin-engine Peruvian military plane crashed close to a gas-refining plant in south Peru, killing 13 people on board. Enditem