April 23 (Reuters) - Sudanese war planes bombed a market in the capital of South Sudan's oil-producing Unity State on Monday, residents and officials said, in an attack the southern army called a declaration of war. Sudan denied carrying out the attack.
Here is a look at conflict between Sudan and South Sudan since a peace agreement was signed in 2005:
Jan. 9, 2005 - Southern rebel leader John Garang and chief government negotiator Vice President A li Osman Mohamed Taha sign a comprehensive peace agreement ending decades of civil war between north and south Sudan. The agreement shares oil revenues between the north and south, sets up a coalition government and promises elections. The south is granted a 2011 referendum on possible secession.
July 9, 2005 - Garang is sworn in as first vice-president of Sudan. Three weeks later he is killed in a helicopter crash. Days of riots follow, killing 100 people.
Aug. 11, 2005 - Salva Kiir, the last surviving founding member of the south's dominant Sudan People's Liberation Movement (SPLM), is sworn in as first vice president. Sudan's new power-sharing government is announced in Khartoum in September.
Dec. 29, 2009 - The NCP and the SPLM pass the referendum law outlining a referendum on southern independence, ending months of wrangling.
Jan. 9, 2011 - Millions of jubilant southern Sudanese vote to split from the north in their secession referendum. A separate promised referendum on whether the disputed Abyei region should also join the south does not take place.
May 31, 2011 - Representatives from north and south Sudan agree to set up a Common Border Zone between north and south Sudan, which is to be demilitarised and monitored and patrolled, the African Union says.
July 9, 2011 - Salva Kiir, standing next to his old foe, Sudan's President Omar Hassan al-Bashir, is sworn in as president of South Sudan, formally declaring independence from Sudan.
Jan. 23, 2012 - South Sudan starts shutting down oil production and accuses Sudan of seizing ${esc.dollar}815 million worth of crude, escalating an increasingly bitter row over oil revenues.
Feb. 10, 2012 - Sudan and South Sudan sign a security agreement which aims to defuse tensions over oil payments. Both countries have failed to agree on how much the landlocked South should pay to transport its oil through Sudan.
March 26, 2012 - Bashir suspends plans to fly to South Sudan to hold new talks, after the South attack the oil-producing area of Heglig, parts of which are claimed by both countries.
April 19, 2012 - Bashir threatens war against South Sudan, vowing to teach his new neighbour a "final lesson by force" after it seizes Heglig. Two days later South Sudan withdraws and accuses its neighbour of bombing its troops as they pull out.
April 23, 2102 - Sudan carries out air strikes on South Sudan killing three people near the oil town of Bentiu, witnesses and the South's army say. Sudan denies the attack. (Reporting by David Cutler, London Editorial Reference Unit; Editing by Andrew Heavens)
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