A total of 23 antique coins were today found when labourers were digging earth to lay the foundation for a school building at Bodiya village in Dumka district, a a senior district official said. "Work at the site has since been stopped after the discovery of the antique coins. We will write about the findings to the Archaeological Survey of India," Dumka Deputy Commissioner Prashant Kumar said here. Some coins were slim and big while other ones were thick and small in size. The site from where the coins were found is half-a-km away from Marpa village, which is also an interesting place for archeologists, another government officer said.