LOS ANGELES, May 7 (Xinhua) -- At least seven students were injured in a shooting Tuesday afternoon at a charter school near Denver, capital of the U.S. western state of Colorado, local police said.

"7 possibly 8 students have been injured. Two shooters in custody. SWAT still clearing school," Douglas County Sheriff's Office tweeted about two hours after the incident.

The reports of shots fired came at 1:53 p.m. local time, according to Douglas County Sheriff's Office, which also confirmed later that two suspects were in custody so far.

Douglas County Undersheriff Holly Nicholson-Kluth was quoted by the local Denver Post newspaper as saying that authorities did not believe another suspect was still in the school, however deputies were still going room to room at the school, clearing the building.