Colombo, June 12:

Tamil Tiger saboteurs came close to cutting off a large chunk of Sri Lanka’s electricity supply today by skirting tight security and setting off a bomb against a key power line, officials said.

The device, which was rigged to a timer, was attached to a steel pylon located between

a key thermal power generating facility and the main control centre in Colombo. The

high-tension line supported by the pylon forms the backbone of the country’s power transmitting system.

The blast was heard 5 km away but caused only minor damage to the pylon, and no disruption to power supply, officials said. No one was hurt in the explosion.

“The line is energised and there is no immediate threat of the cables collapsing,” a spokesman for the Ceylon Electricity Board said. “We have not switched off the supply, but we will start repair work soon.”

Engineers said the bomb could have destabilised Sri Lanka’s entire electricity network by disconnecting the thermal generators from the national grid.