Letters were sent to both embassies on August 22 and another letter was sent to the US Embassy on August 30, according to the police spokesman Martin Halweg.
READ MORE: Dutch Embassy in Moscow Receives Letter Containing White Substance — Reports
He added that letters contained washing detergent and some rambling letters.
According to him, the person who sent those letters is known to authorities and may be the same person who sent similar letters to the embassies in July.
Earlier it was reported that embassies of a number of foreign countries, located in Moscow, received envelopes containing suspicious white powder.