An Egyptian court has extended the detention of alleged Israeli spy Ilan Grapel by 45 days, the Egyptian Al-Ahram newspaper reported on Wednesday.

The U.S. Embassy in Cairo had requested that Grapel be released while the investigation continued but Egyptian prosecutors said Grapel posed a flight risk and the U.S. request was denied, according to the report.

Grapel was arrested in Cairo in June.

Grapel has been accused of sedition and inciting Egyptians to clash with the country's interim military leadership.

Israel has denied the 27-year-old Grapel was a spy.

Grapel's family says he was spending the summer in Cairo as an intern at a legal aid group. Grapel is a law student at Emory University in Georgia.

Grapel, whose father is Israeli, grew up in the U.S. After college, Grapel moved to Israel and joined the IDF, serving as a paratrooper. He was wounded during the Second Lebanon War in 2006.