New Delhi, Dec. 13 -- Raising concerns over the security breach in Parliament, Congress MP Shashi Tharoor on Wednesday claimed that intruders were apparently sponsored by a sitting MP of the ruling party.

He further demanded a detailed response from Union Home Minister Amit Shah.

On the 22nd anniversary of the Parliament terror attack, there was a major security breach when two intruders entered the Lok Sabha chamber from the visitor gallery during Zero Hour.

"The fact that these people (intruders) were apparently sponsored by a sitting MP of the ruling party...These people smuggled in smoke pistols, which shows there is a serious security lapse. Not only did they fired the pistols but also shouted some slogans inaudible to some of us....