The Syrian ceasefire has been violated six times in three different provinces over the past 24 hours, the Russian Center for Syrian reconciliation at the Hmeimim airbase in Syria said late on Saturday.“Six violations of the ceasefire regime have been registered in the Latakia, Hama, and Homs provinces, ” Russian Defense Ministry spokesman Major-General Igor Konashenkov told reporters. Both the Jaysh al-Islam and Ahrar ash-Sham radical Islamist groups violated the ceasefire by firing on Syrian settlements, according to Konashenkov. Meanwhile, Al-Qaeda affiliate Al-Nusra Front shelled the city of Aleppo’s Sheikh Maqsood district, killing 18 civilians and injuring over 60. Konashenkov added that the attack had been part of ongoing clashes between 400 Al-Nusra Front extremists and Kurdish fighters. The ceasefire in Syria has been in effect since February 27. It excludes Islamic State (IS, ISIS/ISIL) and Al-Nusra Front, which are designated as terrorist organizations by the UN Security Council. Meanwhile, two other prominent Islamist groups fighting government forces in Syria, which are also fighting IS but consider Al-Nusra militants “brothers,” are regarded by the Gulf states, Turkey and the West as part of the Syrian opposition.