(Adds quotes, details) MOGADISHU, April 1 (Reuters) - Mortar rounds crashed into central Mogadishu on Sunday in a fourth day of battles between Islamist insurgents and allied Ethiopian and Somali government troops that have killed scores of civilians. Locals living near the main soccer stadium said bombs fired from the south of the capital started striking around 09:30 a.m. (0630 GMT), spreading panic as fighting resumed. The International Committee of the Red Cross says the fighting is Mogadishu's worst for more than 15 years. "We are now being shelled heavily," said one resident of Tawfiq neighbourhood who asked not to be named. "The mortars are being fired from south Mogadishu. People are very scared." Ethiopian troops backed by tanks and helicopter gunships launched the assault on Thursday to crush remnants of a hardline Islamist movement and clan militia fighting alongside them. But civilians have been the main victims. Hospitals have been overwhelmed, but most victims have been unable to seek any kind of help because of the ongoing clashes.
