(SportsNetwork.com) - Former NBA star Anthony Mason is fighting for his life after suffering a heart attack, according to several reports.

"Our thoughts and prayers are with Anthony Mason and his family," the New York Knicks tweeted Wednesday evening.

Longtime NBA columnist Peter Vecsey reported on Twitter that Mason suffered the heart attack while undergoing a test at the hospital.

The New York Daily News, citing a source close to Mason's family, said the power forward known for his bruising style of play was in critical condition following a "massive" heart attack.

According to Vecsey, Mason is suffering from congestive heart failure and has had four surgeries, including one that lasted nine hours.

Mason, 48, appeared in 882 games over 13 NBA seasons with New Jersey, Denver, New York, Charlotte, Miami and Milwaukee, averaging 10.9 points, 8.3 rebounds and 3.4 assists. He was an All-Star in 2001 with the Heat.