Some US officials believe US journalist Austin Tice killed by Israeli strikes on Syria: Report

Some US officials believe that missing American journalist Austin Tice could have been killed by Israeli airstrikes on Syria since the toppling of Bashar al-Assad's government, according to Reuters. 

Israel launched a massive air campaign targeting Syrian military sites after the government of Bashar al-Assad collapsed.

Tice, a former US Marine and freelance journalist, was taken captive in Syria in 2012. US officials have spent years trying to locate him and secure his release. US officials were in talks with the Assad government in the belief it was holding Tice captive. 

Now, US officials are also concerned that if Tice was being held in an underground Syrian prison cell, he may sufficated because Assad's forces shut off electricity providing air to prisons in Damascus.