Syrian troops clashed with defecting soldiers Friday near the border with Turkey, opposition activists said, violating a cease-fire that went into effect a day earlier.

The clashes occurred in the Kherbet Joz village, which borders Turkey.

Both sides have reported cases of scattered violence since the cease-fire was implemented at dawn Thursday, but the border clashes are the first major violation, according to the Syrian Observatory for Human Rights.

The world turned a skeptical eye toward Syria on Thursday after the truce cast relative calm over cities and towns previously pounded by government forces.

"Syria is apparently experiencing a rare moment of calm on the ground," Kofi Annan, the special international envoy who brokered the peace plan, said at the time. "This is bringing much-needed relief and hope to the Syrian people who have suffered so much for so long in this brutal conflict. This must now be sustained."

A premature baby who survived hours in a morgue refrigerator in Argentina was in "very serious" condition after doctors detected an infection, state media reported.

The infection could compromise Luz Milagros Veron's neurological system and kidney function, the Telam news agency reported Thursday.

The nine-day-old baby was being treated with antibiotics, said Diana Vesco, chief of neonatology at the Perrando Hospital in northeast Argentina, according to the state news agency.

The baby's survival grabbed global headlines and prompted her parents to give her a new name: Luz Milagros, the Spanish words for light and miracles.

Pronounced dead after her premature birth on April 3, she withstood more than 10 hours in a coffin inside a morgue refrigerator before being found alive.

Defying warnings from the international community, North Korea launched a long-range rocket on Friday, but it broke apart before escaping the earth's atmosphere and fell into the sea, officials said.

"It flew about a minute, and it flew into the ocean," said Noriyuki Shikata, a spokesman for Japanese Prime Minister Yoshihiko Noda.

He added that Japanese authorities "have not identified any negative impacts, so far," though he said the international ramifications could be significant. "This is something that we think is a regrettable development," he said.

Joseph Cirincione, president of the global security foundation The Ploughshares Fund, told CNN that the launch's apparent failure "shows the weakness of the North Korea missile program" and suggests that the threat from North Korea has been "exaggerated."

"It's a humiliation," he told CNN. "I wouldn't want to be a North Korean rocket scientist today."