Soldiers discovered 2.5 tons of cannabis inside a classroom in southern Afghanistan, while four militants were killed elsewhere in the country, officials said Sunday, dpa reported.
The plants were found in a school in the Arghestan district of Kandahar province on Friday, the US military said in a statement.
"The building contained an estimated two-and-a-half tons of marijuana and a large room filled with marijuana seeds," it said.
"No students or faculty were at the schoolhouse at the time of the discovery. The school's furniture had been taken out of the classrooms and left in the courtyard," it said. "The amount of rust on the furniture indicated the school may not have been used for its intended purpose for a prolonged period of time."
Soldiers destroyed the plants, the statement said.
Four suspected insurgents were killed and five others wounded in Qalat, the capital of southern Zabul province Saturday, the US military said.
Despite the presence of nearly 70,000 international forces, the Taliban-led violence has spiked in Afghanistan in the past two years.