"The security portfolio is a major common concern [for Egypt and Kuwait]," al-Sabah said in response to a question by posed by Emirati privately-owned Sky News Arabia channel on whether the Muslim Brotherhood was discussed during talks Egypt's President Abdel-Fattah al-Sisi held with Kuwaiti leaders during his recent visit to Kuwait.
"The Muslim Brotherhood organization is undoubtedly a source of worry for our brothers in Egypt and in the Gulf Cooperation Council (GCC) member states," he said.
Earlier Tuesday, al-Sisi concluded a two-day visit to Kuwait, during which he met with Kuwaiti Emir Sabah al-Ahmad.
Egyptian authorities blame the Muslim Brotherhood, the group from which ousted President Mohamed Morsi hails, for a recent spate of attacks in the country.
In late 2003, Egypt branded the Brotherhood a "terrorist" group. Saudi Arabia and the United Arab Emirates took similar moves.
The Brotherhood denies condoning violence and says it's committed to peaceful activism.