GENEVA (AP) — This year is on track to become the deadliest ever for migrants crossing the Mediterranean Sea after two heavily loaded boats were wrecked in the past week, possibly killing 700 people fleeing Africa for Europe — the same number as died during all of last year.

That would raise the total number of migrants killed on the sea in 2014 to about 2,900, according to estimates from the International Organization for Migration and other officials.