HANOI, Vietnam (AP) — Vietnamese state media say 10 people, including a family of seven, were killed in twin explosions at a house used to store materials for creating smoke and fire effects in film production.

Tuoi Tre news says the blasts took place Sunday in Ho Chi Minh City, Vietnam’s commercial capital.

The report says the house was owned by a pyro technician who worked in films, and that materials he was storing there were suspected in the blasts. The man, known as “Phoung of Smoke and Fire,” was among the 10 people killed.

According to the report, neighbors said they heard two blasts five minutes apart. They said the explosions broke the windows of nearby houses.

Authorities were not immediately available for comment.