BONN (Reuters) - Commanders from Colombia`s second largest rebel force met non-government leaders on Tuesday for a second day of talks aimed at ending 30 years of civil war. Members of the National Liberation Army (ELN) met Colombian business, labour and church leaders in the south western city of Mainz sponsored by the German Bishops Conference, the conference said in a statement issued late on Monday. The latest peace talks started on Sunday and were likely to finish on Wednesday in time for a news conference scheduled for 3 p.m. (1300 GMT). General Prosecutor Jaime Bernal Cuellar, Sabas Pretelt de la Vega, head of the Colombian industry federation, and Luis Castro, Archbishop of Tunja, as well as ELN central committee member Pablo Beltran gave opening addresses. The meeting split into three groups to analyse the causes of the conflict and each delivered a report which the group discussed. The agenda of the Mainz meeting is being kept under wraps but the ELN, which took up arms against the state in 1964 and now has 5,000 fighters, has said it will centre on 12 points issued by a nationwide guerrilla council in 1992. That document included calls for agrarian reform, a reduction in the role of foreign multinationals in Colombia`s oil industry, greater social spending and a halt to the "dirty war" tactics of the armed forces and right-wing death squads. The FARC and the ELN are estimated to have a combined force of some 20,000 fighters and control of as much as half of the country.