BNP Joint Secretary General Barkatullah Bulu and his wife were injured as a speedy-driven truck knocked his private car on Dhaka-Chittagong Highway near Daudkandi upazila in Comilla at around 10:00pm on Friday.
Bulu was going to Comilla in order to attend Saturday's public rally of the BNP-led 20-party alliance.
Abul Hasem, the upazila unit BNP general secretary, said a speedy-driven truck knocked his private car near Gouripur of Daudkandi, leaving Bulu and his wife injured.
They took primary treatment and stayed the night at Abul Hasem's house in Gouripur.
Later, the highway police seized the truck.