The first of the incidents occurred about 12:40 a.m. in the 2100 block of Second Street NW. A victim was assaulted and items were taken, police said.
The second incident occurred about a block away and five minute later, in the 2000 block of Second. Again the victim was assaulted, the police said.
The third robbery was about a half mile south, on R Street NW, about 1:15 a..m. and the final one was about 3 a.m. in the same vicinity, in the 1700 block of First Street NW.