Traffic reduced to one lane on I-95 in Wellesley as State Police investigate crash

Traffic was reduced to one lane on Interstate 95 in Wellesley Wednesday night while a crash is being investigated by State Police, officials said.

The crash occurred just north of Exit 20, Sgt. Paul Sullivan, a spokesperson for the department, said in a brief telephone interview shortly before 9 p.m.

The right three lanes are closed, so traffic is only permitted in the left lane, State Police said.

It was not known if anyone was injured.

This breaking news story will be updated if more information becomes available.

Andrew Stanton can be reached at andrew.stanton@globe.com. Follow him on Twitter @_andrewstanton.