By Chelsie Jean Baptiste and Joseph Guyler Delva
PORT-AU-PRINCE (Reuters) - An earthquake hit northern Haiti late on Saturday, killing at least 14 people, injuring more than 100 and sparking a scramble by rescue agencies to help towns in the impoverished Caribbean country battered by the shockwave.
A local official said at least eight people died in Port-de-Paix on the northern coast near the epicentre of the magnitude 5.9 quake, which struck at a depth of 11.7 kilometres (7.3 miles), according to the U.S. Geological Survey.
Four people were killed in and around the town of Gros-Morne farther south, local authorities said, including a woman who died from a heart attack suffered after the quake.
Another person was killed in the town of Chansolme when a house collapsed and one other person in Saint-Louis-du-Nord.
Rescue teams fanned out to help residents, many of whom were still dealing with the trauma of a devastating earthquake in 2010.
Port-de-Paix, Gros-Morne, the town of Chansolme and the northern island of Tortuga were among the areas worst hit, Haiti's civil protection agency said in a statement.
"The shock was felt across all departments of the country, giving rise to panic in several towns," the agency said.
President Jovenel Moise urged people to remain calm and said on Twitter he had ordered "all of the republic's resources" to be directed towards assisting recovery efforts. On Sunday morning he said that he was en route to Port-de-Paix and Gros-Morne.
Some houses in the worst-affected areas were destroyed by the earthquake, the agency said.
The civil protection agency said early on Sunday that at least 135 people were being treated for injuries.
Among the damaged buildings was a church in the northern town of Plaisance, the agency said.
The tremor was one of the strongest to batter Haiti since the 7.0 magnitude earthquake struck near the capital, Port-au-Prince, in 2010. It killed tens of thousands of people.
Saturday's quake was felt in Port-au-Prince but initial reports suggested it had not caused major damage there.
Local newspaper Le Nouvelliste said one person was killed when an auditorium collapsed in Gros-Morne and that detainees were released from a damaged police holding cell.
(Writing by Dave Graham; Editing by Susan Fenton and Bill Trott)