The appeal comes after UN Under Secretary-General Valerie Amos briefed the United Nations Security Council about the humanitarian situation in Syria yesterday, telling the members that 6.8 million people were in need of help.
"There is no justification for keeping humanitarian aid from going directly to people who need it in Syria...India needs to raise its voice in their support," said Carroll Bogert, deputy executive director for external relations at Human Rights Watch.
Nearly one-third of Syria's population is estimated to be in urgent need of humanitarian aid.
According to a statement released here, the human rights watchdog claimed that the Security Council had, under pressure from permanent members Russia and China, not called upon the Syrian government to allow UN to transport humanitarian aid directly over its borders into opposition-held areas where aid is needed most.
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But it did not expressly call on Syria to allow direct provision of humanitarian aid across its borders.
Syria has only allowed some "cross-line" aid deliveries that originate in Damascus and are then taken to rebel-held areas.
However, Amos told the Council that the UN has to seek permission from two Syrian government ministers for each truck that then travels more than 300 kilometers through several government controlled checkpoints to reach those in need.
Amos told the Council that the situation in the Middle Eastern country was reaching "the point of no return," with 4.25 million internally displaced, and 1.3 million refugees in neighbouring countries.