Towers Watson Delaware is suing Morgan, Lewis & Bockius for more than $30 million, based on its claims that the firm knowingly helped another client, Meriter Health Services, sue Towers.

The complaint, filed last week, claims Morgan Lewis' alleged conflict of interest in representing Towers was “just the tip of the iceberg.” Towers said Morgan Lewis used its representation of Towers to assist another law firm, referred to in the complaint as “Law Firm 2,” in developing Meriter's lawsuit.

That case ended in a settlement in June, according to a Towers filing with the U.S. Securities and Exchange Commission. The terms were confidential, but Towers has alleged that by assisting Law Firm 2, Morgan Lewis caused Towers to lose more than $25 million, in addition to legal fees already paid. “Morgan Lewis' actions in developing and assisting in the development of claims against the interests of its client Towers, in concert with Law Firm 2, are as shocking as they are abundant,” the complaint said.