A senior UN official is accusing the Syrian government and opposition fighters of committing acts of torture, abduction and kidnapping, "at times along sectarian lines."
Assistant Secretary-General for Political Affairs Oscar Fernandez-Taranco says both sides fail to protect civilians.
He says Secretary-General Ban Ki-moon remains adamant that "there is no military solution" to the Syrian conflict.
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"Likewise, promises of arms should not push the opposition toward different priorities or expectations, other than a political solution."
Fernandez-Taranco says "technical preparations" for a new Geneva peace conference are almost complete.
UN spokesman Martin Nesirky says another US-Russia meeting to prepare for Geneva will be held shortly.