Refer to the passage below and then answer the question afterwards in the same language as the passage:

Passage: In the early 870s, the Cretan raids reached a new intensity: their fleets, often commanded by Byzantine renegades, ranged the Aegean and further afield, reaching the Dalmatian coasts. On one occasion c. 873 a Cretan fleet under the renegade Photios even penetrated into the Marmara Sea and unsuccessfully attacked Proconnesos; the first time since the Second Arab Siege of Constantinople in 717–718 that a Muslim fleet had come so close to the Byzantine capital. On its return however, it suffered a heavy defeat at the hands of the new Byzantine admiral, Niketas Ooryphas, at the Battle of Kardia. Shortly after, Ooryphas once again defeated the Cretans at the Gulf of Corinth and took many prisoners, whom he tortured extensively in revenge for their raids. At about the same time, the Muslim fleet of Tarsus led by Yazaman al-Khadim was destroyed in a raid against Euripos. These Byzantine victories apparently led to a temporary truce, and it appears that the Cretan emir Saïpes (Shu'ayb ibn Umar) was obliged to pay tribute to Byzantium for about a decade.Raids resumed soon after, in which the Cretans were joined by North African and Syrian fleets. The Peloponnese in particular suffered considerably from their raids, but also Euboea and the Cyclades: the islands of Patmos, Karpathos and nearby Sokastro came under Cretan control, and Cretan rule extended as far north as Aegina in the Saronic Gulf, and to Elafonisos and Cythera off the southern coast of the Peloponnese; the great Cycladic island of Naxos, probably along with the neighbouring islands of Paros and Ios, was forced to pay them the poll-tax (jizya). As the Muslim presence left generally few material or literary traces, the list of islands at one time controlled or occupied by them could well be longer. Nevertheless, the impact of this new wave of Arab raids was felt across the Aegean, where some islands were deserted altogether, and elsewhere coastal sites were abandoned for better protected inland locations. Athens may have been occupied in c. 896–902, and in...

Question: When did Syrian flee sack Thessalonica?
in 904