An iron sword and two new tombs were discovered during excavation works on Cape Kaliakra, located in Bulgaria's coastal area.

According to the team from the Institute of Archeology with Museum and the Bulgarian Academy of Sciences the tombs date back to the period of early Christianity, Bulgarian news agency BTA reported.

The remains of two men and one woman were found in the tombs. Archaeologists said that they probably were members of the same family buried at different time.

Archaeologists also focused their work on two buildings uncovered previously. One of them was probably set up during the Early Middle Ages and the second dates from the period of the Second Bulgarian Kingdom in 13th and 14th century.

Both constructions held large number of artifacts. Archaeologists said that one of the most valuable finds was the iron sword. Such weapons were found rarely, which made the sword rather unique, BTA reported.