DENVER -- Officials increased the reward for information about a firebombing incident at a fraternity house near the University of Colorado campus Thursday.

A coalition of police, the University of Colorado and the Interfraternity Council said they will reward up to $3,000 for information leading to the arrest and charges of a suspect in the incident.

The early morning firebomb caused no injuries or significant damage at the Sigma Alpha Epsilon fraternity. Residents had put the fire out by the time firefighters arrived, police spokeswoman Sarah Huntley said.

Huntley said the incident was probably not a hate crime, but more likely stemmed from a feud between the fraternity and residents of a nearby apartment or with another fraternity.

No arrests had been made.

A jug of charcoal starter fluid with a burning firecracker attached was thrown into the Sigma Alpha Epsilon house through an open door at about 2:15 a.m. Oct. 3, Huntley said. Someone inside pushed it back outside with a wet mop.

"We're very, very fortunate that nobody was hurt," she said.

When officers arrived, they found about 30 young men brawling in the alley, Huntley said. Andrew Hansen, 20, a member of the fraternity, was hospitalized for broken facial bones and a deep cut.

Huntley said Hansen did not know who hit him.

The fraternity and some residents of a building across the alley have "a history of some problems," including vandalism to a fence at the fraternity house, Huntley said.

Sigma Alpha Epsilon members also told investigators of tensions between them and another fraternity.

Huntley said police have not identified any suspects.

Anyone with information about this crime is asked to contact Crime Stoppers at 1-800-222-TIPS (8477) or 1-800-444-3776.