Kelton House Museum & Garden, located at 586 E. Town St., according to a Columbus police dispatcher. Columbus Division of Fire Battalion Chief Jeffrey Geitter said that Division of Fire crews were on the scene prior to the explosion on a report of a natural gas leak and detected natural gas.

After reports of a natural gas leak that led to an explosion, more than a dozen fire units and utility crews were on scene at the Kelton House Museum and Garden in Columbus around 2:30 pm on Monday.

In Boston, the search is on to find two suspects who police say fled a research building at Harvard Medical School after an explosion late Saturday night. Police say the explosion appeared to be intentional according to an initial assessment.

A propane tank explosion on the Delmarva Central Railroad tracks in Bear, Delaware, damaged several buildings and homes Saturday afternoon, officials said. Video obtained by CBS News Philadelphia shows thick black smoke before a large explosion sends bystanders running for cover.

Artesia police are responding to an explosion at the HF Sinclair Navajo Refinery. Police say thick smoke is emitting from the plant and drifting over parts of the city.