Story highlights Police arrest two suspects after a four-hour lockdown

The students are charged in connection with in an early-morning fight

The incident began with an altercation and stabbing on campus

After a campus lockdown at Indiana University, police said Sunday that they'd arrested two students involved in an early-morning fight.

Zesen Shen, 18, and Kaiyu Lao, 21, are accused of involvement in an altercation outside a campus apartment building that resulted in a 20-year-old student suffering a knife wound, Indiana University Police spokesman William Munroe said.

Witnesses told police that both suspects chased the 20-year-old student, and Shen cut him with a knife in the apartment building's parking lot around 3:30 a.m..

The victim was taken to the hospital with non-life-threatening injuries, school officials said.

Shen was charged with intimidation and battery, and Lao was charged with intimidation, Munroe said.

The altercation sparked a nearly four-hour campus lockdown early Sunday.

The university issued a tweet saying that an "armed individual" was "at large on campus" and that people should take shelter.

Later, campus police issued an all-clear message and said there was no danger to anyone on campus.