MILWAUKEE (CBS 58) -- The Major Arena Soccer League is investigating incidents that broke out following Game 1 of the MASL Championship Series between the Milwaukee Wave and the San Diego Sockers on Wednesday, April 23.

Tempers flared after a review of a kick to the groin to Wave defender Tony Walls. Fans and players were involved in the altercation after the game at UW-Milwaukee Panther Arena.

"The safety of our players, coaches, and staff is non-negotiable," the league said in a statement Thursday. The MASL said its disciplinary review committee will act swiftly, with potential suspensions and heavy fines for those involved. Fans who threw objects will face indefinite bans from all MASL events and Panther Arena.

The Wave trail the Sockers in the series. Game 2 is Friday, April 24 at Frontwave Arena in Oceanside, Calif.