The Kremlin has issued its sharpest comments about cutting off Russia's natural-gas flow to Europe via the key Nord Stream 1 pipeline on Monday, saying supplies wwould not resume until the "collective West" lifts sanctions against Moscow. "Problems with gas supply arose because of the sanctions imposed on our country by Western states, including Germany and Britain," said Kremlin spokesman Dmitry Peskov during a conference call, Reuters reported on Monday. "We see incessant attempts to shift responsibility and blame onto us. We categorically reject this and insist that the collective West – in this case, the EU, Canada, the UK...