NEW : At least 183 people were killed Monday , an opposition group says . Iran 's foreign minister says calls for al-Assad 's ouster are an interference . Iraq 's foreign minister says Iran 's planes bound for Syria will undergo random inspections . The U.S. and Russia have both said they would consider military action if the Syrian government uses chemical weapons again.
NEW : At least 183 people were killed Monday , an opposition group says . Iran 's foreign minister says calls for al-Assad 's ouster are an interference . Iraq 's foreign minister says Iran 's planes bound for Syria will undergo random inspections . The opposition group puts the human toll in the 19-month crisis at around 28,000 .