Following are the leading stories in the main Indonesian newspapers on April 30. Reuters has not verified these stories and does not vouch for their accuracy. Telephone: Editorial: +62-21-384-6364. Fax: +62-21-344-8404 or Help Desk: +803-061-2124 (toll free). - - - - KORAN TEMPO - GRENADE EXPLODES IN ACEH A grenade exploded at the house of the former spokesman for the Free Aceh Movement (GAM), Sofyan Dawood, in Lhokseumawe, early on Sunday. Nobody was killed or injured in the incident. - - - - JAKARTA POST - YUDHOYONO TO LOOK AT REBUILDING EFFORTS IN POSO Indonesian President Susilo Bambang Yudhoyono will embark on a two-day visit to Central Sulawesi, when he will tour strife-torn Poso to inaugurate a number of reconstruction projects like schools. - - - -