Paris , France -- A bomb threat that led authorities to use sniffer dogs to inspect the Eiffel Tower and surrounding areas Tuesday turned out to have been a hoax , CNN affiliate BFM-TV reported , citing police . The police press office said the telephone threat was reported at 8:20 p.m. and was treated as a routine occurrence ; the tower was inspected to determine whether the threat was real . A telephoned bomb threat also led authorities to briefly evacuate the St. Michel metro station , police said , according to BFM-TV . It was reopened within 30 minutes . Some 2,000 people had been in the area of the Eiffel Tower and the park in which it sits when the evacuation was ordered , police said , according to BFM-TV . Briefly evacuated were a number a nearby apartment buildings and businesses , according to news reports . `` One person on the scene said the police came by and said there was a problem and they had to leave the area quickly , and that 's what they did , '' CNN 's Jim Bittermann reported . A taxi driver said he drove to the tower two tourists who were planning to eat at the Jules Verne Restaurant , where they had made reservations two months ago , but they were turned back by police . More than 100 cameras -- more than a third of which are infrared for nighttime surveillance -- are located on the monument , according to the tower 's website . It also includes a network of sprinklers , and more than 150 extinguishers . A water pipe from the ground feeds hydrants on the first two floors ; the top floor 's hydrants get water from pressurized water tanks . The 324-meter-high ( 1,063-foot-high ) tower is usually open from 9:30 a.m. until 11 p.m. in September . It was built for the Universal Exhibition of 1889 , and was intended to last for 20 years , according to the tower 's website . But it was saved by the advent of wireless telegraphy -- and its use as a platform for antennae . It currently holds 120 antennae . The tower weighs 10,100 tons and is held together by 2.5 million rivets . CNN 's Pat Thompson contributed to this story .
Incident ends with nothing found . The incident , which began around 9 p.m. in Paris , was treated as a routine occurrence . Some 2,000 people were in the evacuation area , which included businesses and apartments .