Congress leader Digvijaya Singh on Sunday apologised for tweeting a picture of a bridge in Pakistan and claiming it to be a railway bridge in Bhopal, days after actor Shabana Azmi did the same over an unverified tweet.

"This is a pillar of an under-construction railway overbridge at Subhash Nagar Railway Gate at Bhopal. The cracks on it raise questions over its quality...I hope what happened in Varanasi doesn't happen here too," Singh had tweeted on Saturday, along with a photograph of a bridge with a pillar that had developed cracks on it.