At least 4 people were injured in a shooting outside Nationals Park stadium in Washington

(CNN) – Players and spectators at Nationals Park in Washington were forced to shelter Saturday night after at least four people were injured during an off-campus shooting, according to police.

CNN reporters inside the stadium reported hearing multiple loud blasts. A message on the scoreboard initially told spectators to stay within baseball status, but was later updated and advised that it was safe to leave the venue.

At least four people were injured, according to tweets posted by the Washington Metropolitan Police Department, which said there appeared to be no ongoing threat at the time. The shooting is under investigation, the department said.

CNN reached out to the Metropolitan Police Department and the Washington Nationals for further comment on the incident.

The Nationals were playing the San Diego Padres when the reported shooting happened. The game was suspended and will resume this Sunday.

This is a developing story.

CNN’s Sam Feist and Lindsey Knox contributed to this report.