(Bloomberg) -- The first fatality after weeks of protests in Sri Lanka over food and fuel shortages intensified calls for President Gotabaya Rajapaksa to resign, with a key opposiiton leader saying he was “responsible for every death.”

Officers fired live rounds Tuesday night in the central Rambukkana area after tear gas failed to dispel a group of protesters who had blocked a train track and tried to set fire to a diesel truck, the police media unit in capital Colombo said by phone. One person was killed in the clash, according to Agence France-Presse and several local media outlets.

Those injured, including police officers, were taken to the nearby Kegalle hospital, the police media unit said, adding that an indefinite curfew has been imposed in the area. Demonstrators pelted police with stones. 

“RESIGN NOW! Unbearable living conditions due to skyrocketing food prices have led ppl to the streets and as HOS, YOU are responsible for every death” Harsha de Silva, a lawmaker from the main opposition Samagi Jana Balawegaya party, said in a Twitter post directed at the president.

Sri Lanka’s economic crisis -- the worst since it gained independence more than 70 years ago -- has brought angry citizens to the streets demanding the ouster of the Rajapaksa family. The government is now seeking as much as $4 billion in emergency aid this year to help the island nation ease hourslong power cuts, shorten fuel lines that go on for miles, and pay for imports of lifesaving drugs and food.

Namal Rajapaksa, the prime minister’s son and a ruling party lawmaker, urged “authorities & protestors a like to not give into violence & stop this escalating any further.” The government didn’t immediately release a statement on the death and the use of live ammunition to disperse crowds. 

Condemnation of the violence poured in on social media, including from several local celebrities and cricket stars in the island nation. U.S. ambassador to Sri Lanka Julie Chung said she was “deeply saddened by the horrible news” and called for a “full, transparent investigation.” 

Fears of a crackdown have persisted for weeks as protesters camp out in downtown Colombo to pressure President Gotabaya Rajapaksa to step down. In a statement on Saturday, the army denied “sinister” rumors that soldiers were now training to assault protesters.

While the Rajapaksas have resisted calls to step down, Prime Minister Mahinda Rajapaksa -- the president’s brother -- on Tuesday said the government would support moves to trim presidential powers in an apparent olive branch to protesters. However, he hasn’t elaborated on the details of the constitutional changes he proposes, and it’s not clear if this will placate the family’s opponents.

A delegation led by Finance Minister Ali Sabry arrived in Washington this week hoping to secure rapid funding from the International Monetary Fund. An official from the global monetary agency said Tuesday night in Washington that discussions were still at an early stage.

“We are very concerned about the current economic crisis in Sri Lanka and hardships suffered by the people,” Masahiro Nozaki, IMF’s mission chief for the South Asian nation, said in a statement confirming talks this week with a delegation from Colombo. “Approval of an IMF-supported program for Sri Lanka would require adequate assurances that debt sustainability will be restored.”

Those assurances are also key to disbursing any emergency funding, he said.

The delegation’s visit follows the central bank’s decision this month to raise interest rates by a record 700 basis points. State-run Ceylon Petroleum Corp. on Tuesday increased petrol prices for a second time in April as imports become costlier after authorities ran out of dollars to defend a currency peg and allowed the rupee to float free.

Sri Lanka’s stock exchange is closed this week to allow investors to assess the economic conditions. The 5.875% note due July 25 was 0.25 cent higher on the dollar at 47.27 cents Wednesday.

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