By Susan Crabtree - 03/04/10 11:45 PM EST
In a one-line statement, the panel on Thursday evening announced it is “investigating and gathering additional information concerning matters related to allegations” against Massa (D-N.Y.).
Massa, a cancer survivor, announced Wednesday afternoon that he would not seek reelection because he is once again battling the disease.
Massa, who is married with two children, was elected to office in November 2008.
This story was updated at 10:46 p.m.