He, however, said the party was not averse to the Parrikar government falling on its own.
"We will not engineer any defection, but if Parrikar government falls on its own, then we are not to be blamed," Singh was quoted as having told Congress legislators during a closed-door meeting, a senior party leader said on condition of anonymity.
There were reports that a section of BJP MLAs unhappy with Parrikar's functioning was in touch with their Congress counterparts and independent legislators to explore the possibility of bringing down the Parrikar government.
The BJP, however, has denied its MLAs were disgruntled with Parrikar and were hobnobbing with the Opposition to pull down the government.
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"The reports that our legislators are grouping with the Opposition is a rumour...It has no basis," BJP Goa unit president Vinay Tendulkar said.
Independent legislator Vijay Sardesai, who claims to have attended several such meetings, said a group within the BJP had taken the lead to destabilise the government.