Egyptian Nobel laureate Mohamed ElBaradei, who resigned as vice-president in protest over a bloody crackdown on supporters of ousted leader Mohamed Morsi, arrived in Vienna on Sunday.
The respected former chief of the Vienna-based International Atomic Energy Agency (IAEA), was spotted at the airport in the Austrian capital, but gave no comment to journalists.
ElBaradei was named vice president after the army ousted Morsi on July 3 following a wave of popular protests.
But the 2005 Nobel Peace Prize winner resigned on August 14 after scores were killed in a crackdown by the military-installed interim regime's security forces on loyalists of the ousted Islamist president.
The death toll in four days of violence has topped 750.
According his entourage, ElBaradei will remain in Vienna, where he still has a home and where several family members live, until Friday.