CHELSEA, MASS. (WHDH) - A massive water main break prompted the temporary closure of a busy highway in Chelsea on Wednesday night.

Route 16 westbound was shut down to traffic due to “unforeseen and unavoidable complications” near Garfield and Washington streets, according to state police.

The Route 1 southbound ramp to Route 16 eastbound was also closed.

Motorists were urged to avoid the area for several hours.

This is a developing news story; stay with 7NEWS for updates online and on-air.

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