Washington, April 20 -- Academy Award-winning director Steven Soderbergh has expressed his frustration with the underperformance of mid-budget films like his latest espionage thriller, 'Black Bag,' at the box office.

Despite receiving critical acclaim, the film's lacklustre box office draw has Soderbergh concerned about the future of cinema.

Soderbergh believes that the inability of mid-level budget, star-driven movies to attract audiences over 25 is a negative trend for the industry.

"If a mid-level budget, star-driven movie can't seem to get people over the age of 25 years old to come out to theatres -- if that's truly a dead zone -- then that's not a good thing for movies," he said in an interview, as quoted by Deadline.

The direct...