The France Under-21 international is reported to have attracted attention from a number of sides across Europe after an outstanding campaign for Celtic in 2016-17.
The forward, who is sidelined with a hamstring injury, scored 32 goals in all competitions as Brendan Rodgers' side claimed the domestic treble without losing a match.
"I can't guarantee anything on what is a sensitive, difficult subject," he told SFR Sport. "We are indeed actively looking for an attacker.
"He [Dembele] is a young player, with power, speed, he's athletic. He's an interesting player.
"Since I started, I've tried to avoid speaking for the coach or the sporting director. I have my ideas, I express them, but I'm not speaking for the coach.
"The names mentioned are interesting, but there are others."
On Aboubakar, who has scored four goals in three games in Portugal's top flight this term, he added: "He's a powerful, athletic guy. He's a very interesting player."