BILLINGS, Mont. (AP) - A 51-year-old man faces felony intimidation charges after someone called 911 in Billings and said "school shooting tomorrow" before hanging up.

Billings Police Chief Rich St. John said Wednesday there was no indication suspect Rodney Wilm of Lockwood intended to carry out the threat. St. John said the call came in at 2:11 a.m. and Wilm was arrested at about 10 a.m.

In the wake of the Newtown, Conn., elementary school massacre, the city's 30 public schools were put on partial lockdown as a precaution.

Superintendent Terry Bouck says that through Friday, exterior school doors will be locked and teachers have been asked to lock classroom doors. He says long-term additional security measures are in the works.

St. John pledged to have more police at city schools for the foreseeable future.