Two teenagers were arrested Thursday for attacking Yale School of Architecture Professor Paul Brouard ARC ’61 on the Newhallville site of a Yale building project that has since been relocated to the West River neighborhood.

Brouard was helping to oversee Yale’s Vlock Building Project, a decades-old program in which first-year architecture graduate students design and build a home in a low-income New Haven neighborhood that the Neighborhood Housing Services then sells to a qualifying buyer. On the morning of May 9, Brouard arrived at the Lilac St. building site when he was hit from behind, knocked to the ground and robbed of his wallet.

His attackers were two teenage boys, 16 and 17 years of age, according to a tip. Two detectives in the New Haven Police Department’s robbery and burglary unit pursued the case, leading to the surrender of the 17-year-old suspect at police headquarters on Wednesday and the subsequent arrest of the 16-year-old in Waterbury, the New Haven Independent reported.

The new site for the building project is 116 Greenwood St., two and a half miles from the original Newhallville location.