At least 72 people including children, women were killed and around 300 injured after a suicide bomber blew himself up at parking area in the Gulshan-e-Iqbal Park on Sunday.
#PrayForLahore became one of the top trending topics on Monday. #IndiawithPakistan was also used by some users.
The park was overcrowded as Christians were celebrating Easter with funfair in the premises when the blast took place.
Bollywood actors like Sonakshi Sinha, Siddharth Malhotra expressed their grief over the terror attack in Lahore.
Prime Minister Narendra Modi spoke to his Pakistani counterpart Nawaz Sharif and offered his "deep condolences" to the victims of the terror attack in Lahore park that left at least 72 dead, mostly women and children.
The responsibility of the brutal attack by a suicide bomber was claimed by Jamaatul Ahrar, a splinter group of the Tehreek-i-Taliban Pakistan (TTP).
What has our world come to. We still living in a world of war.text books need to be revised every year with a new history.#PrayForLahore— Esha Gupta (@eshagupta2811) March 27, 2016
Anger, disgust...Whats the point of these senseless acts of violence? Condolences and prayers to the people of Pakistan! #PrayForLahore— Sonakshi Sinha (@sonakshisinha) March 28, 2016
Once again cowards strike, killing innocents in their dastardly crusade. #PrayForLahore— Sagarika Ghose (@sagarikaghose) March 28, 2016