Chemical plant explosion in Newburyport leaves worker missing and several injured.

An explosion at a chemical plant in Newburyport, Massachusetts, has left one worker missing. Four workers were taken to the hospital and released. The building sustained major structural damage, preventing rescue crews from entering to search for the missing worker. Seqens North America, an active pharmaceutical ingredients manufacturing company, experienced a similar incident in 2020. Officials say there is no danger to area residents.