** Shares of drug developer Keros Therapeutics KROS.O fall ~71% to $20 premarket
** KROS says it has halted dosing of 3.0 mg and 4.5 mg doses of its high blood pressure treatment in a mid-stage study due to fluid buildup around the heart
** Dosing in the 1.5 mg/kg arm will continue after a risk-benefit review by an independent monitoring committee - KROS
** Co has notified the U.S. FDA about it and expects to present data from all treatment arms in Q2 2025 - KROS
** As of last close, stock has fallen 25.7% YTD
(Reporting by Kamal Choudhury in Bengaluru)
((Kamal.Choudhury@thomsonreuters.com;))