A Russian airliner exploded in mid-air and crashed in Egypt's Sinai on last Saturday, Reuters reported.

According to ABC News, the plane headed to St. Petersburg disappeared from radar shortly after it departed El Salam, Egypt. The plane destroyed completely after it broke into two part.

Egypt announced that all the passengers died. 163 bodies out of 224 were transported to hospitals in Cairo.

It will take several days to exam black box recorders and find the cause. As the investigators find out the reason of the crash, the fatalities will return to Russia.

ISIS claimed that they brought down the Kogalymavia airliner but Egypt and Russia did not confirm yet. It had not been sure whether the plane destroyed by mechanical failures or terrorism.

People in Russia visited temporary memorial place of Pulkovo International Airport in memory of the victims.