An international convoy with 40 trucks loaded with relief supplies, including food, medicine, clothing and heating material will leave from the Turkish borders for Syria on Wednesday, a Turkish NGO said on Tuesday.

The announcement was made in a press conference in Istanbul with the participation of members of Syrian National Coalition ( SNC), the biggest opposition umbrella in exile and the representatives of International Union of Muslim Scholars.

All trucks have gathered in Turkish border areas of Hatay, Gaziantep and Sanliurfa on Tuesday and they will enter Syria on Wednesday, as the weather conditions deteriorate in the war-worn country.

As many as 36 local and international civil society organizations took part in the relief efforts initiated by the Turkish Foundation for Human Rights and Freedoms and Humanitarian Relief (IHH) under the slogan of "Pulse of Life," and have gathered 1 million U.S. dollars worth of aid.

The convoy, which is expected to distribute the relief inside Syria within a month, is also joined by activists from Qatar, Kuwait, Sudan, Pakistan, Bahrain, Lebanon, Turkey and France.

Currently, the total number of Syrian refugees has reached 6 million. Turkey hosts 600,000 of them. According to UN's latest report, this figure is expected to be doubled by the end of 2014.