10 injured by multiple shooters outside Pennsylvania nightclub, authorities say

Ten people were injured by multiple shooters who opened fire outside a nightclub in Allentown, U.S. state of Pennsylvania, early Thursday morning, authorities said.

Several people, likely three in number, opened fire shortly before 2 a.m. local time outside the nightclub, Lehigh County District Attorney James Martin and Allentown Police Chief Tony Alsleben said in a joint statement.

"This does not appear to be an indiscriminate shooting; it appears that at least one individual was a target," the statement read, without providing any details.

It remains unclear who fired the shots, local police said. No arrests have been reported.

All 10 people who were shot are expected to survive, according to CNN.

Allentown is Pennsylvania's third most populous city, about 100 km northwest of Philadelphia.