Sources said Sinha during a meeting of top party leaders including L K Advani and Sushma Swaraj this morning vented his anger over the appointment of Ravindra Rai as the party's Jharkhand unit chief, saying "there is a great deal of resentment within the party over Rai's investment".
While Sinha was not available for comments, sources close to him said he has not quit, but is keeping "all options open".
After Sinha's outburst today, BJP President Rajnath Singh sought to placate him and called him up. Singh has sought to discuss the matter with Sinha on his return, as he is currently away to Kolkata.
Sinha had suggested the name of Raghubar Das, a former state party chief, but the party leadership ignored his recommendation which angered Sinha.
The appointment of Rai, who replaced Dineshanand Goswami, came within a day of former chief minister Arjun Munda resigning from the post of state legislative party leader.
Sources said the party was hopeful of assuaging Sinha and sorting out differences within the party in Jharkhand which may go to polls within the next six months. Jharkhand is currently under President's Rule.