Bangladeshi police beat a suspect following an attack on a polling station in the northern town of Bogra.

Deadly clashes erupted on the streets of Bangladesh Monday on the first anniversary of controversial elections as police besieged the main opposition leader in her office.

Police said two supporters of the opposition Bangladesh Nationalist Party were killed in clashes with ruling party activists in the northern town of Natore, fuelling tensions on a day which the BNP has declared “Democracy Killing Day”.

BNP leader Khaleda Zia, despite being confined to her Dhaka office, has urged activists to take to the streets in their thousands as part of a campaign to force Prime Minister Sheikh Hasina to hold fresh multi-party polls.

A local police inspector said the two BNP activists were shot dead during clashes with supporters of Hasina’s Awami League. At least 15 people were injured, Mohammad Fariduddin added.

Violence also broke out in the capital and in around half a dozen towns as police and Awami League followers clashed with hundreds of BNP protesters, local television channels said.

Zia issued the call for mass protests from inside her office, where she has been confined since Saturday night after police cordoned off the area.

Authorities stepped up their siege Monday by parking 11 trucks outside her office in a blockade designed to thwart any attempt by her to head protests in person.

The trucks, laden with sand and bricks, were wedged outside the gates of Zia’s office in the upmarket Gulshan district and at the mouth of the road leading to the building.

Riot police, flanked by armoured vehicles equipped with water cannon, prevented anyone from entering or leaving the premises.

Khaleda Zia and PM Sheikh Hasina wajed

“The trucks have been parked in an effort to step up her security,” Gulshan police chief Rafiqul Islam told AFP.

“She has urged people to join a mass rally today. She would also try to join the protest,” her spokesman Maruf Kamal Khan told reporters.

Hasina, who has been in power since 2009, was re-elected on January 5, 2014, in what was effectively a one-horse race after the BNP and around 20 other opposition parties boycotted the polls over rigging fears.

Zia’s boycott was sparked by her arch rival’s refusal to step down before the election and allow the contest to be organised by a neutral caretaker administration. The caretaker system was in place for previous polls.

The boycott by the BNP and its allies meant a majority of members in the 300-seat parliament were returned unopposed, handing Hasina another five years in power.

Voting was overshadowed by firebomb attacks on polling booths and clashes which left around 25 people dead.

– ‘Insult to democracy’-

Many of the BNP’s top leaders have since been detained or charged in connection with the election violence, hampering their efforts to press for new polls.

BNP headquarters in central Dhaka was padlocked by police at midnight on Saturday, with police vans barricading nearby roads.

BNP officials said at least 500 supporters have been arrested, including two senior party figures, ahead of the poll anniversary.