Sponsors of the , or CISPA, said Tuesday they will support amendments to the legislation, including one that would narrow the way U.S. agencies can use the shared information.

The bill now allows agencies to use the information for a broad range of purposes, but the proposed amendment would limit agencies to acting on cybersecurity issues, on investigations involving potential deaths or serious injury, on investigations involving child pornography and on issues related to U.S. national security. Civil liberties groups had criticized the bill for allowing agencies to use data shared from Internet service providers and other businesses for multiple purposes.

The amendments, which are to be offered by lawmakers when the bill comes to the House floor Thursday, are the result of extensive negotiations with civil liberties groups such as the Center for Democracy and Technology (CDT) and the Constitution Project, said Representative Mike Rogers, a Michigan Republican and chief sponsor of the bill. Facebook has also worked with sponsors to protect its users, Rogers said.

The amendments should address most of the civil liberties and privacy concerns voiced in recent weeks, Rogers said in a press briefing. Rogers is "very, very happy" with the bill with the proposed amendments, he said.

CISPA would allow private companies to share customer communications related to cyberthreats with a wide range of government agencies. The bill exempts private companies that share cyberthreat information in "good faith" from lawsuits from customers.