The increasing conflict in Kyrgyzstan has been reported in the news since it errupted

As a background -

"Kyrgyz make up nearly 70% of the population, Uzbeks account for about 15% and are concentrated in the Ferghana Valley in the south
Osh, the country's second city, is home to a large ethnic Uzbek community
There has been tension in the south between the two ethnic groups over land and housing
In 1990, hundreds were killed in Osh in clashes between Kyrgyz and ethnic Uzbeks"

I have not seen any authoritative reports about what sparked the latest unrest but there is no doubt, according to the Red Cross that it is reaching a humanitarian crisis as the three days of violence between Kyrgyz and Uzbek groups in the city of Osh and surrounding areas have left more than 100 people dead and forced hundreds of thousands to flee into neighbouring Uzbekistan to escape the fighting, according to media reports

The EU's crisis response commissioner Kristalina Georgieva said over the weekend "We have to be ready to react to the humanitarian situation that may arise,"
However, the limited legitimacy of the current interim government is also complicating matters, and may make it harder for the EU to provide medium-to-long-term help, said another EU employee.

Kyrgyzstan's President Kurmanbek Bakiyev was ousted in April and now lives in Belarus where he fled with his family after violent clashes between government forces and protesters on 7 April.

He has denied interim government accusations that he is involved in the unrest in order to derail a 27 June constitutional referendum and elections scheduled for October

Washington uses the base about 300km (190 miles) from Osh for US operations in Afghanistan.

Some eye witness reports