The Green Line trains crashed near Babcock Street around 6 p.m. ET, the Massachusetts Bay Transportation Authority (MBTA) said in a statement.
Miltch Pierre, who works at a nearby Blaze Pizza, told FOX 25 he felt the ground start shaking while he was making pizzas.
“Everything started shaking over there and when I looked over, I was just a bunch of smoke. … I saw someone holding their neck. One girl had blood all over her face and her chin. Pretty gruesome.”