Kathmandu, April 28 -- A shortage of bitumen, triggered by supply disruptions linked to the US-Iran tensions, has brought asphalt works to a halt across Nepal and severely affected major road projects during the peak construction season.

Officials say the disruption has hit national pride and strategic projects and raised concerns that annual targets for road surfacing will not be met. While a few projects continue limited work using existing stock, most have stopped asphalt work altogether.

"There is a shortage of bitumen in the market, and construction material costs have also increased," said Bijay Jaisi, director general of the Department of Roads. "This has had a major impact on projects nationwide. Discussions are ongoing at the d...