German police said on Friday they have arrested two men suspected of plotting a knife attack on worshippers at a synagogue in Heidelberg. The suspects, who are 24 and 18 years old, were detained during separate police operations in the state of Baden-Wuerttember earlier this month, German news agency dpa reported, citing state prosecutors and police. The pair discussed “the killing of one or more visitors in the attack on the synagogue followed by death as martyrs, whereby the two persons wanted to be shot to death by police,” authorities said in a joint statement. The pair could face charges,…