The attack was on Kamouna camp in Idlib province, near the Turkish border.
Monitoring group reveals the toll on civilian life as ceasefire collapses.
The rights group documents refugees forced back to their home countries.
A soft partition in Syria will only harm peace talks and, ultimately, the country's long-term future, writes Chatham House's Doris Carrion.
Jaish al-Islam says it's still coming under attack from government forces.
The cessation of hostilities was "a glimmer of hope", Syrian President Bashar al-Assad said.
The Kremlin's priorities have not changed in eastern Ukraine since 2014.
Military courses have been shortened to get more cadets into Ukraine's armed forces faster.
Russia is signing ceasefires with some groups of fighters and assassinating the leaders of others.
The rebel group ordered a 12-day halt to offensive operations against military targets and businesses.
Members of the battle-hardened Azov battalion are feeling sidelined.
'The notion that there is, or ever was, a cease-fire in eastern Ukraine is a farce.'
Washington says Moscow training pro-Russian rebels and quantity of air defence equipment in eastern Ukraine "highest since August".