"Our relationships with all the coalition partners were good, are good and will remain good," he told reporters here without elaborating when asked about his reaction to Bihar Chief Minister Nitish Kumar's criticism of Modi.
Singh was speaking on the sidelines of the Dalit Samman Samelan organised here to mark the 122nd birth anniversary of Dr B R Ambedkar.
Referring to reports in media of the government's alleged interference in CBI report on the coal block allocation issue, the BJP chief said, "Present regime of the government is playing with the constitutional authorities".
Addressing the Dalit Samman Samelan, Leader of Opposition in the Lok Sabha, Sushma Swaraj, said, "We should celebrate this day as a day of harmony. I urge that Dalits should be treated like younger brothers by all the sections of society.