They could be using backpack bombs, they could be using smaller bombs which can be thrown into objects in public places. That's what we are anticipating.

We cannot yet conclude the source of the blast.

It would be better if there were a deal to postpone the second edition.

This was not from explosive materials, but from chemicals at the laboratory, maybe mixed with gas.

But it is too soon to say from which group they came from, or who inspired them. It's likely they were involved in the earlier conflict and still possess the skills to make bombs.

After Bali, that is the biggest possibility.