Two men were seriously injured on Tuesday when a B-40 rocket exploded at their home in Battambang province’s Phnom Proek district, police officials said. Ham Hak, 58, and his son, Hak Then, 30, of Chakrei commune’s Damnak Ksan village, were attempting to break the rocket to make a large blade from the metal when the rocket detonated. Phnom Proek district police chief, Song Sopheak, said yesterday that the men thought the rocket was old and wouldn’t work anymore. “That is why they hit the rocket,” he said. Both men are recovering in hospital in Sampov Loun district.