Two top

Hewlett-Packard

(HPQ) - Get Report

executives have been summoned before a congressional committee to answer questions about tactics the giant computer maker used to ferret out a boardroom leaker.

Subpoenaed were Chief Ethics Officer Kevin Hunsaker and Chief Security Officer Anthony Gentilucci, according to an anonymous source quoted by Reuters. Also subpoenaed was a private investigator, Ron DeLia, of Security Outsourcing Solutions, the source said.

H-P CEO Mark Hurd agreed last week to testify Thursday before the U.S. House Energy and Commerce Committee.

On Friday, the company announced that Chairwoman Patricia Dunn was stepping down from her position and will be replaced by Hurd, who is widely credited with H-P's turnaround.

News that Hurd may have known about the so-called pretexting (using false identities to elicit information) and other espionage-like tactics used to plug the leak alarmed investors, and the stock took a hit late last week. Thursday's loss of 5.2% was the first time the scandal appeared to hurt the stock.

In recent trading on Monday, H-P regained a bit of lost ground, up 29 cents to $35.395.