The Concord Police Department is looking for witnesses to a crash Thursday on Clinton Street in which a Dunbarton woman was struck from behind by a car, suffering serious injuries.

The police had said the Weare woman who hit Susanne Kibler-Hacker, 52, was issued a warning to "exercise due care." As of Friday afternoon, no further investigation was being made.

Yesterday, Lt. Keith Mitchell of the Criminal Investigation Division issued a press release calling for the public's help with an investigation and asking witnesses or others with information to call the department. Mitchell could not be reached yesterday afternoon, and a watch commander said he had no further details about the investigation.

A hospital spokesman said yesterday evening that Kibler-Hacker was listed in satisfactory condition.

Her husband, Mark Kibler, posted comments to the Monitor website Saturday evening saying that his wife has a long road to recovery.

Her injuries are extensive, he said: breaks to two bones in her lower left leg that required surgery and a rod to stabilize, a break in her hip that also required surgery, a broken vertebra, facial lacerations, contusions and internal bleeding that caused blood clots in her lungs and the need for a respirator.

Kibler wrote that a device was surgically inserted to minimize the risk of blood clots traveling to his wife's heart, brain and lungs.

In his posting, Kibler questioned why the driver was issued a warning and not a summons.

"It seems obvious that, after Susanne had already been struck, it was far too late to issue a warning," he wrote. "The damage had already been done, and it will be a long time mending it. Thankfully Susanne is still alive."

Kibler-Hacker is vice president for development at the Society for the Protection of New Hampshire Forests and commutes regularly to work by bike. She was wearing fluorescent clothing and a helmet when she was hit. A woman who lives on the road and arrived at the scene soon after estimated that she had been thrown about 20 feet.

The section of Clinton Street where she was hit has a narrow shoulder and a speed limit of 45 mph.

The incident has prompted a lot of discussion among cycling advocates about how to make the city safer. The Granite State Wheelmen will make its regularly scheduled Saturday ride in Concord into an awareness ride up Clinton Street in recognition of Kibler-Hacker, according to member Dave Topham. Weather permitting, the group will meet at the Department of Transportation on Hazen Drive at 10:30 a.m.

Nicholas Coates of the Central New Hampshire Regional Planning Commission said his group will hold a community forum about biking safety in the coming weeks as part of a broader effort to develop a bicycle master plan for Concord. The time and place are yet to be determined.

The police are asking anyone with information about the crash to call 225-8600.