Jammu, July 14 (IANS) Dismissing speculation, Jammu and Kashmir Chief Minister Omar Abdullah Thursday said it was yet to be known who was behind the blasts in Mumbai a day earlier which killed at least 17 people and injured 131.

Omar wrote on microblogging site Twitter: "I've heard everything from I.M. (Indian Mujaheedin) to a Kashmir based LeT (Lashkar-e-Taiba) module & a whole lot of groups in between but the truth is WE DON'T KNOW as yet."

In yet another tweet about the Mumbai blasts, he wrote: "Can we have a little more of facts & a little less of rumours about who is behind the attack. If we don't know as yet, let's say we don't know."

Omar also scoffed at panellists on TV channels about the "Mumbai spirit" - a phrase that has been overused since the murderous 2008 terror attack in Mumbai.

He wrote: "And yes, while I'm at it this, whole Mumbai Spirit thing is a bit tiresome now because let's face it no one gave them a bloody choice anyway."