What happened to Brunhild and Sigebert II after Chlotar II seized power in 613?

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After Chlotar II seized power in 613, both Brunhild and Sigebert II were killed by him. Sigebert II, who was king of Austrasia and Burgundy, reigned for only a few weeks before being overthrown. Brunhild, Sigebert II's great-grandmother, was nearly 80 years old when she was captured and tortured for three days before being dragged to death by a horse. This event led to the reunification of the Frankish lands under Chlotar II.123