One person has been killed and at least 27 injured after a bomb explosion in a town in Bangladesh which had been hit by a suicide attack on Tuesday.
The powerful bomb went off outside the main administrative office in Gazipur, police say.
The condition of some of the wounded is serious and they have been moved to the capital Dhaka.
Seven people died in Tuesday's attack. Police have blamed Islamic militants for both blasts.
The latest attack took place during a nationwide strike called in protest against the earlier bombing.
Second bomb
Police say a young man selling tea had hid the bomb in a flask - while being frisked by security men he allegedly threw the bomb at the policemen.
"The suspected bomber... disguised himself as a tea vendor," Gazipur district commissioner Kazi Fale Rabbi is quoted as saying by Reuters.
The alleged bomber was badly hurt in the blast and has been arrested.
Three journalists and seven lawyers have also been wounded in the attack.
A second bomb was discovered and defused in a government building in Narayanganj, some 16km southeast of Dhaka.
Strike
Thursday's strike was called by the Supreme Court Bar Association after bombings at two court complexes on Tuesday.
Vehicles stayed off the streets and shops and business have remained closed. The lawyers were demanding that their security arrangements be improved.
A powerful bomb exploded inside a library near a courthouse in Gazipur, leaving seven people dead and about 50 others injured - police have described it as the country's first ever suicide bombing.
In a second attack on Tuesday, three people, including an alleged bomber, were killed when a series of bombs went off outside a courthouse in the port city of Chittagong.
The government has blamed a banned militant group, Jamaat-ul-Mujahideen, for the explosions and a series of earlier attacks.
The police have now launched a manhunt for more potential bombers.
They say Jamaat-ul-Mujahideen may have set up a suicide squad of some 2,000 bombers to achieve its aim of establishing Islamic law in Bangladesh.
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