CNN reports that the Republican National Committee's data has been hacked.
The network says the information is according to a Republican congressman. No documents have yet been published.
Congressman Michael McCaul, a Republican from Texas, said he learned from intelligence briefings that hackers have targeted the RNC.
It was a similar attack to the hacker raid on the Democratic National Committee.
"They are not discriminating one party against other. They have hacked in both parties at the national level," said the Republican Homeland Security chairman. "We're not sure why they've released some documents and not others."