The U.S. military reported striking two boats allegedly carrying drugs on Wednesday, killing five people, as part of ongoing operations in the Caribbean and eastern Pacific.

These strikes are part of the Trump administration’s “war on drugs,” which has targeted over 30 vessels since September, resulting in more than 110 deaths.

Concerns have been raised over “double-tap” strikes, where survivors of an initial attack were killed in follow-up strikes, potentially violating rules of engagement.

U.S. Southern Command claims intelligence confirmed the vessels were involved in narcotics trafficking, though no direct evidence has been publicly provided, the BBC has reported.

The U.S. Coast Guard is searching for survivors, with eight reported missing from recent attacks, while legal experts question whether such operations comply with laws governing non-international armed conflict.