Increased US drone strikes in Pakistan's tribal areas are linked to a terror plot targeting Europe, Pakistan's US envoy said on Wednesday, amid mounting fears that al Qaeda is planning a wave of attacks. Ambassador Hussein Haqqani told the BBC that the increase in strikes in North Waziristan came after intelligence agencies uncovered a plot to "attack multiple targets in Europe". He also said that a strike on Monday in the district which killed eight militants, including five Germans, was linked to the plot. "I think that the activity we see in North Waziristan in terms of strikes... is connected to the terrorist warnings that we have heard about potential strikes in Europe," he told the British broadcaster. But he urged people to stay calm and vowed intelligence agencies would foil any plot. US drone strikes in Pakistan have increased in recent weeks, with authorities there reporting 24 attacks since September 03 which have killed more than 140 people. US and German media said the information about possible targets was provided by a German national interrogated at Bagram Air Base in Afghanistan. Germany said it was in contact with Pakistani authorities about the drone strike. "The ministry and the embassy are actively pursuing their efforts to clarify the situation," a Foreign Ministry spokesman said. "But for the moment, there is no reliable evidence." According to the Federal Office for the Protection of the Constitution's annual report in June, some 200 Germans or foreigners living in Germany have spent time in Pakistan intending to undergo paramilitary training with Islamist groups.The agency said there are 29 Islamic extremist organisations in Germany, with 36,000 members at the end of 2009 -- 1,500 more than the year before. Haqqani said that "certain people have been arrested in the past, interrogation and other intelligence has revealed that there has been a plot to attack multiple targets in Europe." "We do not want anybody to panic, there shouldn't be any panic because European, Pakistani and American intelligence services are working together to foil these plots," he added. The envoy also said Pakistan was committed to fighting terrorists. "Pakistan has been concerned about the presence of terrorists inside Pakistan or in the regions close to Pakistan for a long time and we have been working very hard at eliminating them."