The Washington Nationals game was called to an abrupt halt on Saturday night after a shooting outside the stadium.

Police said at a late-night press conference that the shooting was an isolated incident and believed to be a shootout between two vehicles.

Earlier, the team had confirmed there was a shooting outside the Third Base Gate at Nationals Park. After initially telling fans to stay in their seats due to an “incident” outside, they were then told to exit the stadium through the Centerfield or Right Field gates.

The game was in the bottom of the sixth inning when fans heard loud pops outside the park. The game was halted as fans were seen heading for the concourse and some even exited the stands onto the field and into the dugouts.

The D.C. Metropolitan Police Department said two people were shot outside the park and there did not appear to be an ongoing threat. Police later said a third person, a woman who was attending the game but was outside the park, was also struck by gunfire.

She is expected to be OK, police said. Two others believed to be involved in the shooting are being questioned at the hospital.

One car involved in the shooting has been recovered and they are looking for the second, authorities said.

The Nationals were losing, 8-4, at the time the game was stopped.

The team said it will pick up the game on Sunday where it left off with a nine-inning game. The game will be part of a doubleheader.

A 6-year-old child was killed in a shooting in Washington, D.C., overnight with officials holding a press conference to announce a $60,000 reward for information into the shooting. Homicides have been on the rise in the city since 2017, according to city crime data.

ABC News’ Sarah Shales contributed to this report.