Icahn’s group raised its stake in TWA again.

The investment group headed by Carl C. Icahn lifted its stake in Trans World Airlines to 25% from 23%, and that it decided to “actively explore” strategies for taking control of the airline. In a filing with the SEC, the New York investors group said it was considering a tender offer or a proxy solicitation as means of attempting to take over TWA. The Icahn group, which previously had said it might seek control of the airline, said its latest decision was made “in light of Trans World’s continued adverse reaction” to the group’s investment. TWA’s management is vigorously fighting Icahn’s involvement in the New York-based air carrier.