University of Connecticut police say witnesses to the killing of football player Jasper Howard are being threatened with violence if they come forward with evidence.

Maj. Ronald Blicher tells the student newspaper, The Daily Campus, that the threats are being made in Internet postings and police are looking into them.

He says authorities are still urging people to submit videos, photos or other information.

SLIDESHOW: UConn Football Player Jasper Howard

Howard, a Miami native and starting cornerback for the Huskies, was stabbed outside a university-sanctioned dance early Sunday, hours after helping his team to a homecoming game win over Louisville.

A 21-year-old Hartford man, Johnny Hood, has been arrested in connection with the fight, but is not charged with stabbing Howard.

A message left with university police early Friday morning was not immediately returned.