Several crude bombs went off in front of Natore district unit BNP office at Alaipur on Saturday ahead of a rally called as part of the opposition party's nationwide programme.
Police said they recovered two live crude bombs from the spot. No one was injured.
BNP has called a countrywide rally on Saturday to press home their 10-point demand, including holding the next polls under a non-party neutral government and to protest against the arrest and harassment of party leaders and activists in ‘false cases'.
The explosions took place around 8:30am when the party leaders and activists were preparing to bring out a procession.
On information, police rushed to the spot and recovered two unexploded crude bombs, said Natore police station Officer-in-Charge Nasim Ahmed.