Archaeologists in Bulgaria claim they have found remains of John the Baptist while excavating the site of a 5th century monastery on the Black Sea island of Sveti Ivan.

A reliquary ?a container for holy relics ?discovered last week under the monastery뭩 basilica was opened on Sunday and found to contain bone fragments of a skull, a hand and a tooth, Bulgaria뭩 official news agency BTA reported.

Excavation leader Kazimir Popkonstantinov lifted the reliquary뭩 lid in a ceremony in the coastal town of Sozopol attended by dignitaries including the Bishop of Sliven, Yoanikii, and Bozhidar Dimitrov, a government minister and director of Bulgaria뭩 National History Museum, BTA said.

Further tests on the fragments are due to be carried out. But Popkonstantinov is convinced the relics belong to John the Baptist because of a Greek inscription on the reliquary referring to June 24, the date when Christians celebrate John the Baptist뭩 birth, according to the website of the Bulgarian Orthodox Church.

A later monastery on the island, built in the 11th century, was dedicated to John the Baptist ?"Sveti Ivan" means "St. John" in Bulgarian and other Slavic languages. Popkonstantinov told Bulgarian news agency Focus that it was possible the earlier basilica was also dedicated to the saint.

Christians believe John the Baptist prophesied the birth of Christ and baptized Jesus in the River Jordan. According to the Gospels, John was put to death by beheading on the orders of the local ruler, Herod Antipas. He is considered a particularly significant figure in the Orthodox Church.

The reliquary is made of alabaster and dates from approximately the middle of the 5th century, Popkonstantinov told reporters. The southern Black Sea coast was then part of the Byzantine Empire, ruled from Byzantium, now Istanbul in Turkey.

Popkonstantinov told Focus the reliquary was the first to be discovered in the region.

Dimitrov told Focus the relics may once have been donated to the monastery by the Byzantine church. The Topkapi Palace museum in Istanbul is one of several sites claiming to house relics purported to be those of John the Baptist.