LINCOLN, Neb. (AP) _ A fraternity house at Nebraska Wesleyan University had passed a fire inspection just two months before a blaze erupted, killing one student and seriously injuring three others, a school official said Wednesday.

``Everything was in compliance according to the certificate issued by the city,'' university spokeswoman Sara Olson said.

Investigators continued to search for the cause of Friday's fire at Phi Kappa Tau and ruled out a laptop computer initially suspected because several million Sony-made batteries were recalled this year after reports of laptops smoking or bursting into flames.

``We have no reason to believe the laptop was the source,'' Lincoln Police Chief Tom Casady said.

State Fire Marshal Dennis Hohbein has said it does not appear the fire was set intentionally.

Three students were hospitalized following the fire. Only one remained hospitalized Wednesday and was in serious condition, officials said.

Nebraska Wesleyan is a Methodist Church-affiliated liberal arts college founded in 1887. There are 1,800 students enrolled there, according to the university's Web site.