(WHTM) — Motorists traveling on I-81 Southbound should expect delays roughly three miles south of Exit: PA 39 – MANADA HILL/HERSHEY.

Get daily news, weather, breaking news, and sports alerts straight to your inbox! Sign up for the abc27 newsletters here. 

As of 1:16 p.m. on Wednesday, the cause of the police activity is unknown. To check the conditions of the roadway and other major roadways, visit 511PA’s website by clicking here.

This is a developing story, check back for updates. Stay up to date on the latest from abc27 News on-air and on the go with the free abc27 Mobile app.