Holiday time in the US, the sightings put a damper on the final days of the summer holiday reports the online site.
Officials at North Beach, Lighthouse Beach, South Beach and Hardings Beach in Chatham and Nauset Beach in Orleans hung red "no swimming" signs, alerting swimmers to the danger.
Biologists at the state Division of Marine tagged two of four sharks with electronic tracking devices says
ContactMusic.com
.
This is the first time a great white has been successfully tagged in the Atlantic Ocean says
The Associated Press
.
The electronic tag uses satellite technology to record the travels of the sharks, allowing scientists to better understand their migratory patterns.
Officials say a harpooner tagged them with help from a state shark expert.
Sharks are common in Cape waters during summer, though great white sharks are relatively rare around New England.
- NZ HERALD STAFF