U.N. urges action against people smugglers after Greece boat disaster.

A Syrian teenager who survived a shipwreck that killed at least 78 people was emotionally reunited with his elder brother on Friday, but there was no news for other relatives gathering in the southern Greek city of Kalamata to search for loved ones. Witness accounts suggested between 400 and 750 people had packed the 20- to 30 metre-long (65- to 100-foot) fishing boat that capsized and sank early on Wednesday morning about 50 miles (80 km) from the southern coastal town of Pylos. A massive search and rescue operation continued on Friday, but hopes were dwindling of finding any more survivors from the hundreds of people believed to have been on board the boat when it sank in some of the deepest waters of the Mediterranean.