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　　The United Nations is closely watching developmentsin South Sudan. The UN refugee agency says heavyfighting and a lack of food in two South Sudanesestates are forcing more people to flee their homes.It says more than 100,000 people have beendisplaced over the past two months.

　　The government in neighboring Sudan has denied itis involved in the South Sudan conflict. But a newreport suggests Sudan's government may besupplying arms to the rebel opposition in theSouth by airdrop. The report says the supposed flowof weapons has helped fuel the fighting.

　　South Sudan became independent from Sudan in 2011, but a civil war started less than twoyears later. South Sudan's military and opposition forces first clashed in December 2013.

　　The new report comes from a private group called Conflict Armament Research, which is basedin Britain. Its members investigate arms trafficking and use of weapons in armed conflicts.

　　The report describes in detail the weapons that the military, also known as the SPLA, seizedfrom the opposition last year. It says the SPLA captured about 300 rounds of small-caliberammunition and some larger artillery in Jonglei state from the rebels. Markings on much of theammunition suggest it was made in Sudan in the past few years.

　　Jonah Leff is the director of operations for Conflict Armament Research. He says themanufacturing dates suggest Sudan is directly involved in supplying the rebels.

　　"Most likely any ammunition manufactured in 2014 most likely hasn't changed hands manytimes, which suggests, like in previous years, that Sudan may have supplied this ammunitiondirectly to the SPLA in opposition."

　　His group says some of the ammunition rounds were manufactured in China. It says theyappear similar to those used in a rebel attack on an Islamic religious center in April 2014. TheUnited Nations says 287 civilians were killed in the attack.

　　The report says the supplies must have been dropped from the air. Jonah Leff says this findingwas based on the damage found on some of the ammunition.

　　"The impact, once the equipment hits the ground, even if it's packaged in crates, sustainssome damage. So we noticed, for instance, with the small caliber ammunition, some of therounds were bent and misfigured. The larger ammunition were stored in tubes that had alsobent and jammed up so that you weren't even able to open them."

　　Mr. Leff says the researchers are almost sure the ammunition was dropped by air. But he addsthat they cannot confirm that it came from Sudanese aircraft.

　　Sudan's government has repeatedly denied reports it is arming the South Sudanese rebels. Thegovernment says it has no interest in deepening the conflict in South Sudan.

　　The new report, however, notes that some of the ammunition documented is similar toequipment Sudan has supplied to rebel groups in the past.

　　Fighting in South Sudan has intensified in recent weeks as the SPLA and rebels battle forcontrol of oil fields in Upper Nile state.

　　The African Union recently expressed support for a United Nations call for a ban on armsexports to South Sudan as a way to stop the conflict. The AU also supported actions topunish those responsible for the violence.

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