Group leader was part of anti-US insurgency in Afghanistan; another designed a computer program to jam flight controls of unmanned aircraft.
Turkish police arrested five students who allegedly aided al-Qaida in Afghanistan, Reuters reported on Friday.
The five men were reportedly taken to court on Friday after being arrested two days earlier.
The group’s leader had been arrested before, and was part of the insurgency against US troops in Afghanistan.
Another suspect, Reuters reported, is a 23-year-old mathematics student who reportedly made bombs and designed computer programs that jam flight controls of unmanned aircraft.
Other suspects raised money for al-Qaida.
In July, Turkish police detained 29 people suspected of links to the al-Qaida, and in January, police rounded up 120 people.
Police were been on alert against suspects since homegrown Islamic militants tied to al-Qaida carried out suicide bombings in Istanbul in 2003, killing 58 people.
In 2008, an attack blamed on al-Qaida-affiliated militants outside the US Consulate in Istanbul left three assailants and three policemen dead.
AP contributed to this report.