On Friday, the police department in a press release said that five detectives and one sergeant would be flying to Boston at the request of the city's police commissioner, Ed Davis.
"What happened in Boston this week has affected all of us and we must stand together in the face of these cowardly acts," said Mayor Emanuel in the statement. "Chicago stands in solidarity with Boston and we are ready to help in any way we can."
Earlier in the week, Mayor Rahm Emanuel and Police Superintendent Garry McCarthy offered the Boston Police Department whatever assistance it needed.
"I spoke with Boston Police Commissioner Ed Davis earlier this morning and reiterated our offer of assistance and resources as Boston deals with unique challenges to solve a despicable crime," said Superintendent McCarthy said in the press release Friday. "Detectives from the Chicago Police Department will head to Boston later today to assist Boston Police in their investigation."
On Friday, the suspects killed an MIT police officer, wounded another lawman before one of them was killed during a chase and gun battle with police. Later in the day, the city and surrounding area were virtually locked down as thousands of police combed the streets in search of the second suspect, a 19-year-old college student named Dzhokhar Tsarnaev.
The Associated Press contributed to this report.