"nuclear-capable Iskander-M missiles "
Magic words "nuclear-capable" does not mean it is armed with nukes.
The road-mobile Iskander is the second
attempt to replace the Scud missile. The first attempt, the Oka, was eliminated under the INF Treaty.
The Iskander appears to have several different conventional warheads, including a cluster munitions warhead, a fuel-air explosive enhanced-blast warhead, a high explosive-fragmentation warhead, an earth penetrator for bunker busting and an electromagnetic pulse device for anti-radar missions.
The missile can also carry nuclear warheads.
The first successful launch occurred in 1996. So, newish, but hardly 'modern' - an upgraded Scud....
The Russian Iskander-M travels at hypersonic speed of 2100–2600 m/s (Mach 6–7) at a height of 50 km. The Iskander-M weighs 4615 kg, carries a warhead of 710–800 kg, has a range of 500 km and achieves a (claimed) circular error probable (CEP) of 5–7 meters.
For some perspective - a common U.S.A.F. Mark 84 is a 2000 lb (907 Kg) general purpose bomb.
Add a strap-on guidance kit and it becomes a Paveway class-device GBU-15 or GBU-31).
Accurate to inches. Will make a 50+ foot wide (and up to 36 feet deep) crater.
A single BONE (B1-B) can carry up to 24 of these munitions.... Btw - all of the type weapons claimed for the Iskander have a counter part in the US inventory - munitions with a well-known and proven track record.
I'd worry more if the Reds started moving SU-24s into the area.....which they won't - because the few that they have that can
fly are in the middle east...