PORT NECHES, Texas (AP) — Two massive explosions 13 hours apart tore through a Texas chemical plant Wednesday, and one left three workers injured.

The blasts blew out windows and doors of nearby homes and prompted a mandatory evacuation of a 4-mile (seven-kilometer) radius from the plant in Port Neches in Southeast Texas, about 80 miles (129 kilometers) east of Houston.

The initial explosion at the TPC Group plant, which makes chemical and petroleum-based products, occurred around 1 a.m. It sent a large plume of smoke stretching for miles and started a fire.

The three workers hurt during the b...