Two former Dartmouth College students say they've been expelled for causing a dorm fire last month, and they're asking for a second chance.

Sebastian Lim and Daniel Ro say in an online petition they want to "publicly apologize" for the Oct. 1 fire. Fire officials said an unattended hibachi-style grill on the roof sparked it. Dartmouth had said that using the grill was against college policy.

The dorm's 70 residents escaped, but needed new housing. A total of more than 300 were made to leave a cluster of dorms.

Ro and Lim said their expulsion is based, in part, on the grounds that they pose a threat to the community. They said they made a mistake.

College spokeswoman Diana Lawrence said that under the Family Educational Rights and Privacy Act, she couldn't comment on Dartmouth's disciplinary process.