Six people were killed in serial blasts that took place in Patna on Sunday before Modi's rally.
Reacting to reports that the Bharatiya Janata Party (BJP), in a bid to give Modi's rallies a secular hue, was asking Muslims to attend the gatherings dressed in traditional veils and skull caps, Umari said such measures won't help the party.
"Who knows who it is behind the burqa (veil)? The person may well be a man. I condemn the use of such Muslim symbols," Umari said.