ABC News’ Katti Gray reports:

Two runners collapsed near the downtown finish line of today’s Philadelphia Marathon and were pronounced dead at Hahnemann Hospital.

ABC station WPVI-TV in Philadelphia reported that rescue workers said neither of the men, aged 21 and 40, had vital signs before they were transported to the hospital. Police confirmed their deaths.

The runners had set out at 7 a.m. under partly sunny skies, with the temperature rising to a high of 64 degrees, which some in the crowd said was ideal running weather.

The names and hometowns of the runners are being withheld until their relatives are notified.

Race organizers expressed their condolences in a statement released this afternoon: “We are deeply saddened and our thoughts are with their families and friends. We cannot at this time disclose the identities of the runners pending notification of the families. We will provide more information as it becomes available. Our thoughts remain with the runners’ families and friends.”