The Lok Sabha on Thursday condemned the terror attack ' title=' terror attack '>terror attack outside the Parliament House in London.

The house observed two-minute silence in memory of those killed in the London attack on Wednesday.

Speaker Sumitra Mahajan also remembered the revolutionaries Bhagat Singh, Rajguru and Sukhdev on their death anniversary, and said the "nation will never forget their sacrifice".

The three were sent to gallows by the colonial British rulers on this date in 1931.

Lok Sabha is adjourned for a day.