The late and renowned Hadith scholar, Shaikh al-Albani (rahimahullah) said on this subject:

“…Now we come to suicide missions, we have come to know of this from the Japanese and their likes when a man amongst them would attack an American war ship with his fighter jet. He would blow up along with his jet, however he would inflict damage upon the soldiers in that American war ship. We say: Suicide missions in the present time, all of them, are not legislated (by Islam) and all of them are unlawful. They could be of the types (of suicide) which cause a person to remain in the Hellfire eternally. As for suicide missions being (a means of) nearness, by which one seeks closeness to Allah, then today (we find) that a man fights for the sake of his land or his homeland. These suicide missions are not Islamic, absolutely…

From the cassette recording, “The Verdicts of the Scholars concerning Assassinations and Bombings”, quoted in the book, “The Verdicts of the Scholars in Englightening the (Muslim) Nation”, of Jamal bin Farihan al-Harithi (p.76).