The centre, which also has a base near Damascus, is the main agency for developing chemical weapons and new missiles for the Assad regime.
An Israeli air strike also targeted Asbar's research centre on July 22, Syrian state media reported. An official from Syria and Iran's alliance, who spoke to The Times on the condition of anonymity because he was not authorized to talk to Western journalists, said that he believed Israel had wanted to kill Asbar because he played a prominent role in Syria's missile program even before the current conflict broke out in 2011.
Israeli Minister of Military Affairs Avigdor Lieberman downplayed the possibility of Israeli involvement, telling Channel 2 news that, "Every day in the Middle East there are hundreds of explosions and settling of scores".More news: Stokes 'behaved like a bully' towards two gay men
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In April 2017, followed the chemical attack on the Syrian rebel held city of Khan Sheikhoun that killed 18 civilians including 5 children, the Trump administration levelled sanctions on 271 CERS workers.
According to al-Watan daily newspaper, Syrian authorities had twice detained cells of local suspects allegedly recruited by Mossad who were engaged in monitoring Asbar's movements.
The report said the assassination was part of Israel's campaign of aggression aimed at preventing Syria from rehabilitating its defense capabilities when the crisis in the Arab country comes to an end - with an emphasis on preventing the development of precision weapons.
The attack came as Syrian troops regained territory along the 1974 demarcation line separating the Israeli-occupied Golan Heights from Syria. Both Syrian President Bashar Al-Assad and Hezbollah accused Israel of assassinating the high-level scientist shortly after the bombing took place. Their standoff now however has been further complicated by the extensive presence in Syria of Iran, which maintains advisers and allied militias embedded with the Syrian army.