The death toll of a powerful explosion at a luxury hotel in Cuba’s capital increased to 31 as search crews with dogs continued looking for people still missing.

The Hotel Saratoga, a five-star 96-room hotel in Old Havana, was preparing to reopen after being closed for two years when an apparent gas leak ignited, blowing the outer walls into the busy, midmorning streets just a block from the country’s Capitol building on Friday.

Several nearby structures also were damaged, including the historic Marti Theatre and the Calvary Baptist Church, headquarters for the denomination in western Cuba. The church said on its Facebook page that the building suffered “significant structural damage, with several collapsed or cracked walls and columns (and) the ceiling partially collapsed,” though no church workers were hurt.

In releasing the names of those who were killed, the Health Ministry said the dead included four minors, a pregnant woman and a Spanish tourist, whose companion was seriously injured.

The ministry also said 54 people were injured, with 24 taken to hospital. It previously reported 85 injured, but that tally turned out to include those killed by the explosion.

Nineteen families had reported people missing as of Saturday evening, but authorities did not say on Sunday whether the number had changed.

Authorities said the cause of the explosion at the hotel owned by Grupo de Turismo Gaviota SA was still under investigation, but believed it to have been caused by a gas leak. A large crane hoisted a charred gas tanker out of the rubble on Saturday.

Burials for victims had begun, municipal authorities said, while some people still waited for news of missing friends and relatives.

“We are hoping that something will be known about my cousin’s mother,” Angela Acosta told The Associated Press near the site of the explosion.

Crews have worked to clean up streets around the hotel and by late Saturday, substantial pedestrian traffic had resumed.

The explosion added to the woes of a crucial tourism industry that had been stifled by the coronavirus pandemic as well as tightened sanctions imposed by former US President Donald Trump and kept in place the Biden administration.

Tourism had started to revive somewhat early this year, but the war in Ukraine deflated a boom of Russian visitors, who accounted for almost a third of the tourists arriving in Cuba last year.

The Saratoga, which had been closed through the pandemic, was one of the elite lodgings in Havana, often hosting visiting VIPs and celebrities. Its owner is one of the Cuban military’s businesses.