Cambridge August 30, 2023 11:47 pm Manhole explosions cause chaos in Harvard Square Crews are working to make repairs after several manhole explosions in Cambridge. US & World Videos 1:54 Authorities looking for man accused of sexual assault in Cambridge 0:17 Child injured after being struck by car outside Saugus mall 2:23 Search for suspect after sexual assault reported in Cambridge 4:09 Budgets, staffing, and social media can all impact violence in schools, administrators say 2:35 Sumner Tunnel closed for weekend