“Caution is the best line we can follow, without rushing to pass judgement or make statements on this complex situation that we cannot reduce to a tweet,” Bonino said in a statement released by the foreign ministry.
Morsi was put under house arrest last night, a year after taking office following the 2011 Arab Spring revolt which led to the fall of then President Hosni Mubarak.
Since being elected as leader of the Muslim Brotherhood in June 2012 Morsi’s popularity has plummeted, particularly due to the president’s handling of the country’s new constitution.
The military overthrow came after days of violent protest, both for and against Morsi.
Adly Mansour, a judge from Egypt's Constitutional Court, was sworn in as interim president on Thursday.
Responding to the news, EU Foreign Minister Catherine Ashton called for the country to resume its democratic transition.
“I urge all sides to rapidly return to the democratic process, including the holding of free and fair presidential and parliamentary elections and the approval of a constitution,” she said in a statement.