Dispute over a piece of land led to one of the two groups allegedly detonating industrial explosives in a building under construction in the wee hours of Tuesday.

Duvvuri Tata Rao and V. Govinda Rao, a lawyer, were living at Sivaji Palem near Sivaji Park. They reportedly have long-standing dispute over the ownership of a plot of land in front of Govinda Rao's house. Govinda Rao approached the court and reportedly started construction of a house in the disputed site. He obtained a decree from the court in his favour recently.

Accordingly, he constructed the ground and first floors. At 1.30 a.m., an explosion ripped through the building. The blast was so powerful that the walls on the first floor developed cracks and glass panes of the adjacent building shattered.

An old woman sustained injuries when fragments of construction material fell on her.

Most of the residents in the locality had gone to witness the China Polamamba jatara at Sivajipalem when the blast occurred.

“Two sets of gelatine sticks were planted in the building, one on the ground floor and the other on the first. The blast was triggered by a remote control device,” said a policeman, who was at the scene on Tuesday morning. Luckily, the gelatine sticks on the ground floor didn't explode.

Sniffer dogs were pressed into service. The Three Town police are investigating.