Exploring the most controversial aspect of the Sunanda Pushkarmurder case, Delhi Police have examined Pakistan-based columnist Mehr Tarar, highly placed sources have told TOI.

Only a handful of people in the department knew about it, they added.Tarar came to India two, three months ago for the questioning, which was conducted at a five-star hotel in central Delhi.

The police wrote to her last December asking her to cooperate in the probe. After promising cooperation, she sent a confirmation to the DCP (south) in February, the sources said.Pushkar, wife of then Union minister Shashi Tharoor, was found dead at Leela Hotel's suite number 345 on January 17, 2014.

The death came just a day after she was involved in a spat with Tarar on Twitter over the latter's alleged affair with Tharoor.