New US strike kills four in Caribbean

Washington began carrying out such strikes -- which experts say amount to extrajudicial killings even if they target known traffickers -- in early September, taking aim at vessels in the Caribbean and eastern Pacific.

This week's reported strike took the toll to 80 deaths in 20 strikes in international waters.

The timing of the strike was not clear, with broadcaster CBS reporting the boat was destroyed on Monday and the New York Times reporting the strike took place on Wednesday, both citing an unnamed Pentagon official.