Up to 17,000 people have taken part in the SSE Airtricity Dublin Marathon today.

Organisers said 16,825 people started the race this morning. Thousands of runners and walkers continued to cross the finish line this afternoon.

The race is now the fourth largest event of its kind in Europe, with 5,700 international participants this year.

Record numbers signed up for the race, representing an increase of 25% when compared with last year.

It has moved from its traditional October Bank Holiday Monday to a Sunday, and started on Fitzwilliam Square just before 9am.

The wheelchair racers set off first, followed by the elite athletes and other runners a short time later.

Ethiopia's Dereje Tulu won the men's race, taking the lead at the third mile. 

Moldovan-born Sergiu Ciobanu was the first person across the finish line for Ireland in 2:17:35.

Meanwhile, Patrick Monahan from Caragh, Co Kildare was the first man in the wheelchair category to cross the finish line in a time of 1:39:18.

This was his fourth Dublin Marathon and he also won the race last year. 

The marathon route runs along Patrick Street, down the quays, turning up Blackhall Place, before entering the Phoenix Park.

After visiting Castleknock and another section through the Park, the race passes through Dolphin's Barn, Crumlin, Terenure and Stillorgan – before heading back to the city centre.

The early finishers crossed the line on Mount Street shortly after 11am.

There was some confusion at the start of the race as competitors were forced to avoid a motorbike which was left unattended on the course.

In a statement, race organisers said they were "made aware of the obstruction" and "immediately took action for removal".

The blue BMW bike was located at Fitzwilliam Square, the most congested part of the route.

Numerous road closures and restrictions were in place throughout the city centre, the Phoenix Park and on Dublin's southside.

Dublin Bus is advising customers its real-time bus information system will be out of service today.

More than 20 routes were also affected by the marathon, however the race did not affect Luas services.

GALLERY: Dublin Marathon