Five people who were killed in Iranian ballistic missile strikes in the early hours of Monday morning have been named as Yaakov and Hadassah Belo, Daisy Yitzhaki, and Igor Fradkin and Uri Levy.

The five were killed when missiles slammed into Israeli cities in at least five locations, claiming the lives of eight people in total. Close to 300 others were injured in the same barrage.

Fradkin and Levy were among three people killed in a strike on the Bazan oil refinery complex in Haifa, northern Israel. The identity of the third victim, Dani Avraham, was made public Monday night.

Yitzhaki, 85, and Yaakov and Hadassah Belo, both 77, were killed in a barrage on the central city of Petah Tikva, in which four people were killed. The name of the city’s fourth victim has yet to be released.

Ofir Belo, the couple’s Brazil-based son, announced the death of his parents in a Facebook post on Tuesday, saying he was “in total shock.”

The two were sheltering in their safe room when a missile with a large explosive warhead slammed into their 20-story apartment block, impacting a wall right between two safe rooms, which were unable to withstand the intensity of the blast.

Israeli authorities say reinforced rooms located inside apartments are suitable protective spaces in case of attack, though they are largely designed to protect against shrapnel and shock waves, and unlike underground bunkers used for public shelters, cannot necessarily stand up to a direct impact of heavy explosives.

According to officials, reinforced rooms have saved countless lives in the missile barrages from Iran thus far.

Yitzhaki, who was killed in the same strike, is thought to have been outside of a protected space at the time of the attack. Her caregiver was also injured in the impact, according to Ynet.

In a statement on Tuesday afternoon, Petah Tikva Mayor Rami Greenberg confirmed that Yitzhaki was among the four killed in the Iranian missile strike, and said the municipality would formally release the names of the other three victims later in the day.

“With deep sorrow and great pain, we bow our heads together with all city residents over the cruel murder of four Petah Tikva residents in yesterday’s deadly missile barrage,” he said. “We are assisting the families in every way necessary, and will continue to stand by them in these difficult moments.”

Fradkin, 50, and Levy, 58, were killed when the Bazan oil refinery, where they both worked, was struck by an Iranian missile. Their coworker Dani Avraham, 59, from Kiryat Motzkin, was named as a victim Monday night.

Avraham, a father of two, was remembered by the Kiryat Motzkin municipality as a “modest man, dedicated and respected, who worked in the energy industry for more than 30 years and was always willing to help even in difficult times.”

Fradkin, a resident of nearby Kiryat Ata, worked at the oil refinery for 17 years, his family said, and he “believed deeply in what he did,” considering it to be his part in “taking care of the country.”

He was survived by his wife, three children and a granddaughter.

He will be buried on Wednesday at the Tel Regev Cemetery.

“My heart goes out to the Fradkin family in this difficult time of loss and bereavement,” Kiryat Ata Mayor Yaakov Peretz said in a statement. “On behalf of myself and the residents of the city, I offer my deepest condolences.

Levy, who lived in Haifa and worked for decades at the oil refinery, was survived by his wife, three children and a grandson. One of his sons got married just two weeks ago, the Kan public broadcaster reported.

He was buried at the city’s Sde Yehoshua Cemetery earlier on Tuesday.

Bazan offered condolences to the families of the three men, whom they said were “dedicated professionals who fell while doing their duty.”

The three weren’t killed in the initial missile impact at the refinery complex, Haaretz had reported Monday, but in a subsequent fire that broke out at the site.

At first, rescuers had been able to communicate with them, the report said, but they lost contact early on in the rescue mission, and fear for their well-being grew as the hours wore on.

It is believed that the cause of death for all three was suffocation, as well as the extreme heat from the fire.

In total, 24 people have been killed and hundreds more have been wounded by Iranian missile strikes since Friday, when Israel launched a major offensive against Iran, hitting nuclear sites and scientists, missile bases and top military officials.

Iran has launched some 350 ballistic missiles at Israel since Friday, the vast majority of which were intercepted, according to IDF statistics released Monday.