The U.N. Security Council expressed yesterday its grave concern over a serious deterioration of the economic and humanitarian situation in Yemen amid worsening security, including the threat from Al Qaida in the region. In a press statement, the Council urged all parties in Yemen to ensure that those in need of humanitarian assistance can be reached, voicing concern over the increasing interruption of the flow of basic supplies. The United Nations body also urged all parties to refrain from targeting vital infrastructure. “The members of the Security Council urged all sides in Yemen to reject violence and show maximum restraint,” said the statement, read to reporters by Ambassador Hardeep Singh Puri of India, which holds the Council’s rotating presidency this month. “They called upon all the parties to respect their obligations under applicable international law.”