( CNN ) -- Polish authorities said Tuesday they 've broken up a plot to bomb Parliament , arresting two people and recovering enough materials to make a 4-ton bomb . The investigation began with an analysis of the Internet shopping list of convicted Norwegian extremist Anders Breivik . The primary suspect is a university lecturer with expertise in explosives who told police he wanted to bomb Parliament with the president , prime minister and other officials in attendance , according to Piotr Kosmaty , the spokesman for the appellate prosecutor 's office in Krakow . Read more : Eye on Poland . Nationalist and anti-Semitic interests motivated the 45-year-old chemist , who was not part of any particular party or movement , Kosmaty said . Police arrested the man November 9 . His identity was not released . During the arrest , police found guns , hundreds of rounds of ammunition , body armor and materials that could be used to make a bomb , including fuses , detonators and other materials , according to Lt. Col. Maciej KarczyÅ „ ski , a spokesman for the Internal Security Service . The second suspect , arrested Tuesday , is believed to be a loose confederate of the university lecturer , Kosmaty said . He had enough material to quickly assemble a 4-ton bomb , Kosmaty said . Police did not release that man 's identity either . Police identified another suspect but said that person poses no danger , Kosmaty added . It was not immediately clear if that suspect had been arrested . Read more : Norway killer Anders Breivik ruled sane , given 21-year prison term . The plot first came to light with an investigation into Breivik 's contacts abroad , the Polish prime minister 's office said Tuesday . Breivik , a right-wing extremist , exploded a fertilizer bomb outside the Norwegian prime minister 's office on July 22 , 2011 , killing eight people . He then headed to a Labour Party youth camp where he killed 69 more people . He was convicted in June and sentenced in August to 21 years in prison . According to the Polish prime minister 's office , Breivik bought some explosive components from Polish sources via the Internet , and an examination of those contacts led police to start their investigation . Prime Minister Donald Tusk congratulated police on the investigation , and said the plot should be a wake-up call for the country . `` Let this be a signal to all of us that we should be wise from harm , and renounce the language of hatred and violence in the public debate , '' he said . CNN 's Sebastien Delame and Antonia Mortensen contributed to this report .
Polish authorities break up a plot to bomb Parliament . The probe began with a look at a Norwegian terror suspect 's Polish contacts . Two suspects have been arrested . Authorities say they recovered guns , ammunition , and materials to make a 4-ton bomb .