In two of three final reports there are bombs worn or placed by the attackers. In two of the reports the final assault was started by government personell (either directly, letting it look like the hostage takers started it, or by killing the guy on a dead man’s switch). In one report it was classified as a suicide attack from the start.

The dead man’s switch was confirmed by one of the surviving attackers. He also was the one speaking of a dispute between the attackers concerning the target building (school vs. police station).

They wore explosive belts. That’s why i supect they intended to blow themself up. Sure, I could be wrong. But then you got to find better sources.

Why are you getting cynical now?

I asked where it states that Putin bombed the school. Your own source contradicts your comment. So please explain.

Where in that article does it say it was bombed deliberately? And by Putin?

The first explosions were the bombs placed by the attackers themselves. The fighting afterwards was as expected.