(CNN) - The New Jersey state Assembly and Senate will announce Tuesday that the two legislative bodies will form one committee to investigate allegations that Gov. Chris Christie's administration engaged in abuse of power, sources told CNN's Dana Bash and Shimon Prokupecz.
Both houses already had their own investigatory committees but decided to create one joint committee for the rest of the investigation.
The committee will have subpoena power and use the special counsel already hired by the Assembly committee, former Assistant U.S. Attorney Reid Schar.
The Assembly committee issued 20 subpoenas last week, and sources say those subpoenas will still stand under the new committee.
The two houses decided to merge their investigations in order to avoid sending two subpoenas to the same people and delay the investigation or tie things up in court.
The 12-member panel will include eight Democrats and four Republicans. Assemblyman John Wisniewski and Senate Majority Leader Loretta Weinberg, both Democrats, will co-chair the committee. They each served as the leaders in their respective houses' investigatory committees.