Though the reason for Leher Singh's visit has not been officially disclosed to the media, BJP sources said the two leaders met to negotiate on Yeddyurappa's return to the National Democratic Alliance (NDA).
Leher Singh is also likely to meet BJP president Rajnath Singh and party patriarch LK Advani.
Former Karnataka chief minister Yeddyurappa on Wednesday said his party will support Narendra Modi as BJP's prime ministerial candidate.
"There is no question of merging with the BJP. But we will join the NDA and share seats in the 2014 Lok Sabha elections," Yeddyurappa told reporters.
"We will back Modi as PM," he said.
Yeddyurappa had formally quit the BJP on Nov 30, 2012.
On July 31, 2011, Yeddyurappa was forced to resign as chief minister of Karnataka after he was indicted by the then Karnataka Lokayukta N. Santosh Hedge in the illegal mining report.
He and his family members were named by Hegde in what was called a Rs 16,000 crore illegal mining scam.
Yeddyurappa walked out of jail on Nov 8, 2011 on bail.
The veteran leader is credited to bringing the BJP to power in Karnataka.
--IBNS (Posted on 19-09-2013)