State police say two people are dead in an apparent murder-suicide at a Cummins Inc. engine factory in southern Indiana.

Sgt. Stephen Wheeles says preliminary reports are that one person was shot dead Thursday morning at the Cummins plant in Seymour and that the assailant then died by suicide.

Police have yet to release their identities or the circumstances of their deaths. The (Seymour) Tribune reports police were called about 8:40 a.m.

Cummins spokesman Jon Mills says the company's facilities in Seymour and Columbus are on lockdown while the attack is investigated. The newspaper says workers have been escorted from the building.

The Cummins Seymour Engine Plant, about 60 miles south of Indianapolis, has several hundred employees. The Columbus-based company makes generators and engines used in trucking, farming and construction equipment.