A UPS driver was packing some illegal cargo – pot and some open alcohol -- leading up to a multi-vehicle crash in which Pennsylvania State Police say the driver was DUI.

The 27-year-old UPS driver was under the influence and had marijuana and an open alcohol container in his vehicle, Pa. state police say.

It happened during Friday rush hour outside of Pittsburgh.

The Post-Gazette reports the 27-year-old UPS driver was under the influence and had marijuana and an open alcohol container in his vehicle when he struck three other vehicles on Route 28 in O’Hara Township, according to Pa. state police.

The identity of the driver was not immediately made public.

State police say several passengers in the struck vehicles suffered injuries and were transported to various hospitals in the 6:28 p.m. Friday crash.

State police tell the newspaper their investigation determined the UPS driver had been driving under the influence while operating a commercial vehicle and was in possession of marijuana and an open container.

Exact charges were pending lab results, police told the Post Gazette.